code_style: remove all IDE warnings

src/App.axaml.cs

@@ -5,7 +5,6 @@ using System.Net.Http;
 using System.Reflection;
 using System.Text;
 using System.Text.Json;
-using System.Text.RegularExpressions;
 using System.Threading.Tasks;
 using System.Windows.Input;
 
@@ -45,12 +44,12 @@ namespace SourceGit
         [STAThread]
         public static void Main(string[] args)
         {
-            AppDomain.CurrentDomain.UnhandledException += (sender, e) =>
+            AppDomain.CurrentDomain.UnhandledException += (_, e) =>
             {
                 LogException(e.ExceptionObject as Exception);
             };
 
-            TaskScheduler.UnobservedTaskException += (sender, e) =>
+            TaskScheduler.UnobservedTaskException += (_, e) =>
             {
                 LogException(e.Exception);
                 e.SetObserved();
@@ -333,7 +332,8 @@ namespace SourceGit
 
         private static void LogException(Exception ex)
         {
-            if (ex == null) return;
+            if (ex == null)
+                return;
 
             var builder = new StringBuilder();
             builder.Append($"Crash::: {ex.GetType().FullName}: {ex.Message}\n\n");
@@ -467,7 +467,7 @@ namespace SourceGit
             if (!File.Exists(file))
                 Environment.Exit(-1);
 
-            desktop.MainWindow = new Views.CodeEditor(file);
+            desktop.MainWindow = new Views.StandaloneCommitMessageEditor(file);
             return true;
         }
 

src/Commands/CompareRevisions.cs

@@ -1,4 +1,5 @@
-using System.Collections.Generic;
+using System;
+using System.Collections.Generic;
 using System.Text.RegularExpressions;
 
 namespace SourceGit.Commands
@@ -18,7 +19,7 @@ namespace SourceGit.Commands
         public List<Models.Change> Result()
         {
             Exec();
-            _changes.Sort((l, r) => l.Path.CompareTo(r.Path));
+            _changes.Sort((l, r) => string.Compare(l.Path, r.Path, StringComparison.Ordinal));
             return _changes;
         }
 

src/Resources/Styles.axaml

@@ -170,6 +170,9 @@
     <Setter Property="MaxHeight" Value="768"/>
   </Style>
   
+  <Style Selector="Grid.repository_leftpanel">
+  </Style>
+
   <Style Selector="Path">
     <Setter Property="Fill" Value="{DynamicResource Brush.FG1}"/>
     <Setter Property="Stretch" Value="Uniform"/>
@@ -178,6 +181,7 @@
   </Style>
   <Style Selector="Path[IsVisible=True].rotating">
     <Setter Property="Opacity" Value="0"/>
+    <Setter Property="Data" Value="{StaticResource Icons.Loading}"/>
     <Style.Animations>
       <Animation Duration="0:0:1" IterationCount="Infinite">
         <KeyFrame Cue="0%">
@@ -193,6 +197,7 @@
   </Style>
   <Style Selector="Path[IsVisible=True].waiting">
     <Setter Property="Opacity" Value="0"/>
+    <Setter Property="Data" Value="{StaticResource Icons.Waiting}"/>
     <Style.Animations>
       <Animation Duration="0:0:1" IterationCount="Infinite">
         <KeyFrame Cue="0%">
@@ -1192,6 +1197,17 @@
     <Setter Property="Opacity" Value="1"/>
   </Style>
   
+  <Style Selector="Slider">
+    <Style.Resources>
+      <Thickness x:Key="SliderTopHeaderMargin">0,0,0,4</Thickness>
+      <GridLength x:Key="SliderPreContentMargin">0</GridLength>
+      <GridLength x:Key="SliderPostContentMargin">0</GridLength>
+      <CornerRadius x:Key="SliderThumbCornerRadius">8</CornerRadius>
+      <x:Double x:Key="SliderHorizontalThumbWidth">16</x:Double>
+      <x:Double x:Key="SliderHorizontalThumbHeight">16</x:Double>
+    </Style.Resources>
+  </Style>
+
   <Style Selector="TabItem">
     <Setter Property="FontSize" Value="14"/>
     <Setter Property="Padding" Value="10,0"/>

src/ViewModels/ChangeTreeNode.cs

@@ -0,0 +1,145 @@
+using System;
+using System.Collections.Generic;
+
+using Avalonia.Collections;
+
+using CommunityToolkit.Mvvm.ComponentModel;
+
+namespace SourceGit.ViewModels
+{
+    public class ChangeTreeNode : ObservableObject
+    {
+        public string FullPath { get; set; } = string.Empty;
+        public int Depth { get; private set; } = 0;
+        public Models.Change Change { get; set; } = null;
+        public List<ChangeTreeNode> Children { get; set; } = new List<ChangeTreeNode>();
+
+        public bool IsFolder
+        {
+            get => Change == null;
+        }
+
+        public bool IsExpanded
+        {
+            get => _isExpanded;
+            set => SetProperty(ref _isExpanded, value);
+        }
+
+        public ChangeTreeNode(Models.Change c, int depth)
+        {
+            FullPath = c.Path;
+            Depth = depth;
+            Change = c;
+            IsExpanded = false;
+        }
+
+        public ChangeTreeNode(string path, bool isExpanded, int depth)
+        {
+            FullPath = path;
+            Depth = depth;
+            IsExpanded = isExpanded;
+        }
+
+        public static List<ChangeTreeNode> Build(IList<Models.Change> changes, HashSet<string> folded)
+        {
+            var nodes = new List<ChangeTreeNode>();
+            var folders = new Dictionary<string, ChangeTreeNode>();
+
+            foreach (var c in changes)
+            {
+                var sepIdx = c.Path.IndexOf('/', StringComparison.Ordinal);
+                if (sepIdx == -1)
+                {
+                    nodes.Add(new ChangeTreeNode(c, 0));
+                }
+                else
+                {
+                    ChangeTreeNode lastFolder = null;
+                    var start = 0;
+                    var depth = 0;
+
+                    while (sepIdx != -1)
+                    {
+                        var folder = c.Path.Substring(0, sepIdx);
+                        if (folders.TryGetValue(folder, out var value))
+                        {
+                            lastFolder = value;
+                        }
+                        else if (lastFolder == null)
+                        {
+                            lastFolder = new ChangeTreeNode(folder, !folded.Contains(folder), depth);
+                            folders.Add(folder, lastFolder);
+                            InsertFolder(nodes, lastFolder);
+                        }
+                        else
+                        {
+                            var cur = new ChangeTreeNode(folder, !folded.Contains(folder), depth);
+                            folders.Add(folder, cur);
+                            InsertFolder(lastFolder.Children, cur);
+                            lastFolder = cur;
+                        }
+
+                        start = sepIdx + 1;
+                        depth++;
+                        sepIdx = c.Path.IndexOf('/', start);
+                    }
+
+                    lastFolder.Children.Add(new ChangeTreeNode(c, depth));
+                }
+            }
+
+            Sort(nodes);
+
+            folders.Clear();
+            return nodes;
+        }
+
+        private static void InsertFolder(List<ChangeTreeNode> collection, ChangeTreeNode subFolder)
+        {
+            for (int i = 0; i < collection.Count; i++)
+            {
+                if (!collection[i].IsFolder)
+                {
+                    collection.Insert(i, subFolder);
+                    return;
+                }
+            }
+
+            collection.Add(subFolder);
+        }
+
+        private static void Sort(List<ChangeTreeNode> nodes)
+        {
+            foreach (var node in nodes)
+            {
+                if (node.IsFolder)
+                    Sort(node.Children);
+            }
+
+            nodes.Sort((l, r) =>
+            {
+                if (l.IsFolder)
+                    return r.IsFolder ? string.Compare(l.FullPath, r.FullPath, StringComparison.Ordinal) : -1;
+                return r.IsFolder ? 1 : string.Compare(l.FullPath, r.FullPath, StringComparison.Ordinal);
+            });
+        }
+
+        private bool _isExpanded = true;
+    }
+
+    public class ChangeCollectionAsTree
+    {
+        public List<ChangeTreeNode> Tree { get; set; } = new List<ChangeTreeNode>();
+        public AvaloniaList<ChangeTreeNode> Rows { get; set; } = new AvaloniaList<ChangeTreeNode>();
+    }
+
+    public class ChangeCollectionAsGrid
+    {
+        public AvaloniaList<Models.Change> Changes { get; set; } = new AvaloniaList<Models.Change>();
+    }
+
+    public class ChangeCollectionAsList
+    {
+        public AvaloniaList<Models.Change> Changes { get; set; } = new AvaloniaList<Models.Change>();
+    }
+}

src/ViewModels/Preference.cs

@@ -349,8 +349,8 @@ namespace SourceGit.ViewModels
             {
                 if (l.IsRepository != r.IsRepository)
                     return l.IsRepository ? 1 : -1;
-                else
-                    return l.Name.CompareTo(r.Name);
+
+                return string.Compare(l.Name, r.Name, StringComparison.Ordinal);
             });
 
             collection.Clear();
@@ -413,13 +413,9 @@ namespace SourceGit.ViewModels
             list.Sort((l, r) =>
             {
                 if (l.IsRepository != r.IsRepository)
-                {
                     return l.IsRepository ? 1 : -1;
-                }
-                else
-                {
-                    return l.Name.CompareTo(r.Name);
-                }
+
+                return string.Compare(l.Name, r.Name, StringComparison.Ordinal);
             });
 
             container.Clear();

src/ViewModels/RevisionFileTreeNode.cs

@@ -0,0 +1,32 @@
+using System.Collections.Generic;
+using System.IO;
+
+using CommunityToolkit.Mvvm.ComponentModel;
+
+namespace SourceGit.ViewModels
+{
+    public class RevisionFileTreeNode : ObservableObject
+    {
+        public Models.Object Backend { get; set; } = null;
+        public int Depth { get; set; } = 0;
+        public List<RevisionFileTreeNode> Children { get; set; } = new List<RevisionFileTreeNode>();
+
+        public string Name
+        {
+            get => Backend == null ? string.Empty : Path.GetFileName(Backend.Path);
+        }
+
+        public bool IsFolder
+        {
+            get => Backend != null && Backend.Type == Models.ObjectType.Tree;
+        }
+
+        public bool IsExpanded
+        {
+            get => _isExpanded;
+            set => SetProperty(ref _isExpanded, value);
+        }
+
+        private bool _isExpanded = false;
+    }
+}

src/Views/About.axaml

@@ -2,7 +2,6 @@
                     xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
                     xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
                     xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
-                    xmlns:vm="using:SourceGit.ViewModels"
                     xmlns:v="using:SourceGit.Views"
                     mc:Ignorable="d" d:DesignWidth="800" d:DesignHeight="450"
                     x:Class="SourceGit.Views.About"

src/Views/About.axaml.cs

@@ -16,40 +16,42 @@ namespace SourceGit.Views
         public About()
         {
             var ver = Assembly.GetExecutingAssembly().GetName().Version;
+            if (ver != null)
                 Version = $"{ver.Major}.{ver.Minor}";
+
             DataContext = this;
             InitializeComponent();
         }
 
-        private void BeginMoveWindow(object sender, PointerPressedEventArgs e)
+        private void BeginMoveWindow(object _, PointerPressedEventArgs e)
         {
             BeginMoveDrag(e);
         }
 
-        private void CloseWindow(object sender, RoutedEventArgs e)
+        private void CloseWindow(object _1, RoutedEventArgs _2)
         {
             Close();
         }
 
-        private void OnVisitAvaloniaUI(object sender, PointerPressedEventArgs e)
+        private void OnVisitAvaloniaUI(object _, PointerPressedEventArgs e)
         {
             Native.OS.OpenBrowser("https://www.avaloniaui.net/");
             e.Handled = true;
         }
 
-        private void OnVisitAvaloniaEdit(object sender, PointerPressedEventArgs e)
+        private void OnVisitAvaloniaEdit(object _, PointerPressedEventArgs e)
         {
             Native.OS.OpenBrowser("https://github.com/AvaloniaUI/AvaloniaEdit");
             e.Handled = true;
         }
 
-        private void OnVisitJetBrainsMonoFont(object sender, PointerPressedEventArgs e)
+        private void OnVisitJetBrainsMonoFont(object _, PointerPressedEventArgs e)
         {
             Native.OS.OpenBrowser("https://www.jetbrains.com/lp/mono/");
             e.Handled = true;
         }
 
-        private void OnVisitSourceCode(object sender, PointerPressedEventArgs e)
+        private void OnVisitSourceCode(object _, PointerPressedEventArgs e)
         {
             Native.OS.OpenBrowser("https://github.com/sourcegit-scm/sourcegit");
             e.Handled = true;

src/Views/AddRemote.axaml

@@ -2,10 +2,8 @@
              xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
              xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
              xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
-             xmlns:m="using:SourceGit.Models"
              xmlns:vm="using:SourceGit.ViewModels"
              xmlns:v="using:SourceGit.Views"
-             xmlns:c="using:SourceGit.Converters"
              mc:Ignorable="d" d:DesignWidth="500" d:DesignHeight="450"
              x:Class="SourceGit.Views.AddRemote"
              x:DataType="vm:AddRemote">
@@ -44,7 +42,7 @@
                  Text="{DynamicResource Text.SSHKey}"
                  IsVisible="{Binding UseSSH}"/>
       <TextBox Grid.Row="2" Grid.Column="1"
-               x:Name="txtSSHKey"
+               x:Name="TxtSshKey"
                Height="28"
                CornerRadius="3"
                IsVisible="{Binding UseSSH}"

src/Views/AddRemote.axaml.cs

@@ -11,15 +11,21 @@ namespace SourceGit.Views
             InitializeComponent();
         }
 
-        private async void SelectSSHKey(object sender, RoutedEventArgs e)
+        private async void SelectSSHKey(object _, RoutedEventArgs e)
         {
-            var options = new FilePickerOpenOptions() { AllowMultiple = false, FileTypeFilter = [new FilePickerFileType("SSHKey") { Patterns = ["*.*"] }] };
             var toplevel = TopLevel.GetTopLevel(this);
+            if (toplevel == null)
+                return;
+
+            var options = new FilePickerOpenOptions()
+            {
+                AllowMultiple = false,
+                FileTypeFilter = [new FilePickerFileType("SSHKey") { Patterns = ["*.*"] }]
+            };
+
             var selected = await toplevel.StorageProvider.OpenFilePickerAsync(options);
             if (selected.Count == 1)
-            {
-                txtSSHKey.Text = selected[0].Path.LocalPath;
-            }
+                TxtSshKey.Text = selected[0].Path.LocalPath;
 
             e.Handled = true;
         }

src/Views/AddSubmodule.axaml

@@ -2,10 +2,8 @@
              xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
              xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
              xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
-             xmlns:m="using:SourceGit.Models"
              xmlns:vm="using:SourceGit.ViewModels"
              xmlns:v="using:SourceGit.Views"
-             xmlns:c="using:SourceGit.Converters"
              mc:Ignorable="d" d:DesignWidth="500" d:DesignHeight="450"
              x:Class="SourceGit.Views.AddSubmodule"
              x:DataType="vm:AddSubmodule">

src/Views/AddWorktree.axaml

@@ -2,9 +2,6 @@
              xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
              xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
              xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
-             xmlns:m="using:SourceGit.Models"
-             xmlns:v="using:SourceGit.Views"
-             xmlns:c="using:SourceGit.Converters"
              xmlns:vm="using:SourceGit.ViewModels"
              mc:Ignorable="d" d:DesignWidth="800" d:DesignHeight="450"
              x:Class="SourceGit.Views.AddWorktree"

src/Views/AddWorktree.axaml.cs

@@ -11,13 +11,13 @@ namespace SourceGit.Views
             InitializeComponent();
         }
 
-        private async void SelectLocation(object sender, RoutedEventArgs e)
+        private async void SelectLocation(object _, RoutedEventArgs e)
         {
-            var options = new FolderPickerOpenOptions() { AllowMultiple = false };
             var toplevel = TopLevel.GetTopLevel(this);
             if (toplevel == null)
                 return;
 
+            var options = new FolderPickerOpenOptions() { AllowMultiple = false };
             var selected = await toplevel.StorageProvider.OpenFolderPickerAsync(options);
             if (selected.Count == 1)
                 TxtLocation.Text = selected[0].Path.LocalPath;

src/Views/Apply.axaml

@@ -5,7 +5,6 @@
              xmlns:m="using:SourceGit.Models"
              xmlns:vm="using:SourceGit.ViewModels"
              xmlns:v="using:SourceGit.Views"
-             xmlns:c="using:SourceGit.Converters"
              mc:Ignorable="d" d:DesignWidth="800" d:DesignHeight="450"
              x:Class="SourceGit.Views.Apply"
              x:DataType="vm:Apply">
@@ -20,7 +19,7 @@
                  Margin="0,0,8,0"
                  Text="{DynamicResource Text.Apply.File}"/>
       <TextBox Grid.Row="0" Grid.Column="1"
-               x:Name="txtPatchFile"
+               x:Name="TxtPatchFile"
                Height="28"
                CornerRadius="3"
                Watermark="{DynamicResource Text.Apply.File.Placeholder}"

src/Views/Apply.axaml.cs

@@ -11,18 +11,21 @@ namespace SourceGit.Views
             InitializeComponent();
         }
 
-        private async void SelectPatchFile(object sender, RoutedEventArgs e)
+        private async void SelectPatchFile(object _, RoutedEventArgs e)
         {
             var topLevel = TopLevel.GetTopLevel(this);
             if (topLevel == null)
                 return;
 
-            var options = new FilePickerOpenOptions() { AllowMultiple = false, FileTypeFilter = [new FilePickerFileType("Patch File") { Patterns = ["*.patch"] }] };
+            var options = new FilePickerOpenOptions()
+            {
+                AllowMultiple = false,
+                FileTypeFilter = [new FilePickerFileType("Patch File") { Patterns = ["*.patch"] }]
+            };
+
             var selected = await topLevel.StorageProvider.OpenFilePickerAsync(options);
             if (selected.Count == 1)
-            {
-                txtPatchFile.Text = selected[0].Path.LocalPath;
-            }
+                TxtPatchFile.Text = selected[0].Path.LocalPath;
 
             e.Handled = true;
         }

src/Views/Archive.axaml

@@ -14,11 +14,11 @@
                Classes="bold"
                Text="{DynamicResource Text.Archive.Title}"/>
     <Grid Margin="0,16,0,0" RowDefinitions="32,32" ColumnDefinitions="120,*">
-      <TextBlock Grid.Column="0"
+      <TextBlock Grid.Row="0" Grid.Column="0"
                  HorizontalAlignment="Right" VerticalAlignment="Center"
                  Margin="0,0,8,0"
                  Text="{DynamicResource Text.Archive.Revision}"/>
-      <ContentControl Grid.Column="1" Content="{Binding BasedOn}">
+      <ContentControl Grid.Row="0" Grid.Column="1" Content="{Binding BasedOn}">
         <ContentControl.DataTemplates>
           <DataTemplate DataType="m:Branch">
             <StackPanel Orientation="Horizontal">
@@ -49,7 +49,7 @@
                  Margin="0,0,8,0"
                  Text="{DynamicResource Text.Archive.File}"/>
       <TextBox Grid.Row="1" Grid.Column="1"
-               x:Name="txtSaveFile"
+               x:Name="TxtSaveFile"
                Height="28"
                CornerRadius="3"
                Watermark="{DynamicResource Text.Archive.File.Placeholder}"

src/Views/Archive.axaml.cs

@@ -11,15 +11,21 @@ namespace SourceGit.Views
             InitializeComponent();
         }
 
-        private async void SelectOutputFile(object sender, RoutedEventArgs e)
+        private async void SelectOutputFile(object _, RoutedEventArgs e)
         {
-            var options = new FilePickerSaveOptions() { DefaultExtension = ".zip", FileTypeChoices = [new FilePickerFileType("ZIP") { Patterns = ["*.zip"] }] };
             var toplevel = TopLevel.GetTopLevel(this);
+            if (toplevel == null)
+                return;
+
+            var options = new FilePickerSaveOptions()
+            {
+                DefaultExtension = ".zip",
+                FileTypeChoices = [new FilePickerFileType("ZIP") { Patterns = ["*.zip"] }]
+            };
+
             var selected = await toplevel.StorageProvider.SaveFilePickerAsync(options);
             if (selected != null)
-            {
-                txtSaveFile.Text = selected.Path.LocalPath;
-            }
+                TxtSaveFile.Text = selected.Path.LocalPath;
 
             e.Handled = true;
         }

src/Views/Askpass.axaml

@@ -2,7 +2,6 @@
                     xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
                     xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
                     xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
-                    xmlns:vm="using:SourceGit.ViewModels"
                     xmlns:v="using:SourceGit.Views"
                     mc:Ignorable="d" d:DesignWidth="800" d:DesignHeight="450"
                     x:Class="SourceGit.Views.Askpass"

src/Views/Askpass.axaml.cs

@@ -9,7 +9,7 @@ namespace SourceGit.Views
     public partial class Askpass : ChromelessWindow
     {
         public static readonly StyledProperty<bool> ShowPasswordProperty =
-            AvaloniaProperty.Register<Askpass, bool>(nameof(ShowPassword), false);
+            AvaloniaProperty.Register<Askpass, bool>(nameof(ShowPassword));
 
         public bool ShowPassword
         {
@@ -42,18 +42,18 @@ namespace SourceGit.Views
             InitializeComponent();
         }
 
-        private void BeginMoveWindow(object sender, PointerPressedEventArgs e)
+        private void BeginMoveWindow(object _, PointerPressedEventArgs e)
         {
             BeginMoveDrag(e);
         }
 
-        private void CloseWindow(object sender, RoutedEventArgs e)
+        private void CloseWindow(object _1, RoutedEventArgs _2)
         {
             Console.Out.WriteLine("No passphrase entered.");
             Environment.Exit(-1);
         }
 
-        private void EnterPassword(object sender, RoutedEventArgs e)
+        private void EnterPassword(object _1, RoutedEventArgs _2)
         {
             Console.Out.Write($"{Passphrase}\n");
             Environment.Exit(0);

src/Views/AssumeUnchangedManager.axaml.cs

@@ -11,12 +11,12 @@ namespace SourceGit.Views
             InitializeComponent();
         }
 
-        private void BeginMoveWindow(object sender, PointerPressedEventArgs e)
+        private void BeginMoveWindow(object _, PointerPressedEventArgs e)
         {
             BeginMoveDrag(e);
         }
 
-        private void CloseWindow(object sender, RoutedEventArgs e)
+        private void CloseWindow(object _1, RoutedEventArgs _2)
         {
             Close();
         }

src/Views/AutoFocusBehaviour.cs

@@ -7,7 +7,7 @@ namespace SourceGit.Views
     public class AutoFocusBehaviour : AvaloniaObject
     {
         public static readonly AttachedProperty<bool> IsEnabledProperty =
-            AvaloniaProperty.RegisterAttached<AutoFocusBehaviour, TextBox, bool>("IsEnabled", false, false);
+            AvaloniaProperty.RegisterAttached<AutoFocusBehaviour, TextBox, bool>("IsEnabled");
 
         static AutoFocusBehaviour()
         {
@@ -30,9 +30,11 @@ namespace SourceGit.Views
             {
                 elem.AttachedToVisualTree += (o, _) =>
                 {
-                    var text = o as TextBox;
-                    text.Focus(NavigationMethod.Directional);
-                    text.CaretIndex = text.Text == null ? 0 : text.Text.Length;
+                    if (o is TextBox box)
+                    {
+                        box.Focus(NavigationMethod.Directional);
+                        box.CaretIndex = box.Text?.Length ?? 0;
+                    }
                 };
             }
         }

src/Views/Avatar.cs

@@ -38,7 +38,7 @@ namespace SourceGit.Views
         public Avatar()
         {
             var refetch = new MenuItem() { Header = App.Text("RefetchAvatar") };
-            refetch.Click += (o, e) =>
+            refetch.Click += (_, _) =>
             {
                 if (User != null)
                 {
@@ -59,7 +59,7 @@ namespace SourceGit.Views
                 return;
 
             var corner = (float)Math.Max(2, Bounds.Width / 16);
-            var img = Models.AvatarManager.Request(_emailMD5, false);
+            var img = Models.AvatarManager.Request(_emailMD5);
             if (img != null)
             {
                 var rect = new Rect(0, 0, Bounds.Width, Bounds.Height);
@@ -114,7 +114,7 @@ namespace SourceGit.Views
             foreach (var c in hash)
                 builder.Append(c.ToString("x2"));
             var md5 = builder.ToString();
-            if (avatar._emailMD5 != md5)
+            if (avatar._emailMD5 == null || avatar._emailMD5 != md5)
                 avatar._emailMD5 = md5;
 
             avatar._fallbackBrush = new LinearGradientBrush

src/Views/Blame.axaml

@@ -2,13 +2,10 @@
                     xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
                     xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
                     xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
-                    xmlns:m="using:SourceGit.Models"
                     xmlns:vm="using:SourceGit.ViewModels"
                     xmlns:v="using:SourceGit.Views"
-                    xmlns:c="using:SourceGit.Converters"
                     mc:Ignorable="d" d:DesignWidth="800" d:DesignHeight="450"
                     x:Class="SourceGit.Views.Blame"
-                    x:Name="me"
                     x:DataType="vm:Blame"
                     Icon="/App.ico"
                     Title="{DynamicResource Text.Blame}"

src/Views/Blame.axaml.cs

@@ -37,7 +37,7 @@ namespace SourceGit.Views
                 if (view != null && view.VisualLinesValid)
                 {
                     var typeface = view.CreateTypeface();
-                    var underlinePen = new Pen(Brushes.DarkOrange, 1);
+                    var underlinePen = new Pen(Brushes.DarkOrange);
 
                     foreach (var line in view.VisualLines)
                     {
@@ -189,7 +189,7 @@ namespace SourceGit.Views
 
             public override void Render(DrawingContext context)
             {
-                var pen = new Pen(_editor.BorderBrush, 1);
+                var pen = new Pen(_editor.BorderBrush);
                 context.DrawLine(pen, new Point(0, 0), new Point(0, Bounds.Height));
             }
 
@@ -282,21 +282,24 @@ namespace SourceGit.Views
             if (string.IsNullOrEmpty(selected))
                 return;
 
-            var icon = new Avalonia.Controls.Shapes.Path();
-            icon.Width = 10;
-            icon.Height = 10;
-            icon.Stretch = Stretch.Uniform;
-            icon.Data = App.Current?.FindResource("Icons.Copy") as StreamGeometry;
-
-            var copy = new MenuItem();
-            copy.Header = App.Text("Copy");
-            copy.Icon = icon;
-            copy.Click += (o, ev) =>
+            var copy = new MenuItem() { Header = App.Text("Copy") };
+            copy.Click += (_, ev) =>
             {
                 App.CopyText(selected);
                 ev.Handled = true;
             };
 
+            if (this.FindResource("Icons.Copy") is StreamGeometry geo)
+            {
+                copy.Icon = new Avalonia.Controls.Shapes.Path()
+                {
+                    Width = 10,
+                    Height = 10,
+                    Stretch = Stretch.Fill,
+                    Data = geo,
+                };
+            }
+
             var menu = new ContextMenu();
             menu.Items.Add(copy);
 
@@ -323,7 +326,7 @@ namespace SourceGit.Views
     {
         public Blame()
         {
-            if (App.Current?.ApplicationLifetime is IClassicDesktopStyleApplicationLifetime desktop)
+            if (Application.Current?.ApplicationLifetime is IClassicDesktopStyleApplicationLifetime desktop)
             {
                 Owner = desktop.MainWindow;
             }
@@ -331,7 +334,7 @@ namespace SourceGit.Views
             InitializeComponent();
         }
 
-        private void MaximizeOrRestoreWindow(object sender, TappedEventArgs e)
+        private void MaximizeOrRestoreWindow(object _, TappedEventArgs e)
         {
             _pressedTitleBar = false;
 
@@ -343,18 +346,22 @@ namespace SourceGit.Views
             e.Handled = true;
         }
 
-        private void BeginMoveWindow(object sender, PointerPressedEventArgs e)
+        private void BeginMoveWindow(object _, PointerPressedEventArgs e)
         {
             if (e.ClickCount != 2)
                 _pressedTitleBar = true;
         }
 
-        private void MoveWindow(object sender, PointerEventArgs e)
+        private void MoveWindow(object _, PointerEventArgs e)
         {
-            if (!_pressedTitleBar)
+            if (!_pressedTitleBar || e.Source == null)
                 return;
 
             var visual = (Visual)e.Source;
+            if (visual == null)
+                return;
+
+#pragma warning disable CS0618
             BeginMoveDrag(new PointerPressedEventArgs(
                 e.Source,
                 e.Pointer,
@@ -363,9 +370,10 @@ namespace SourceGit.Views
                 e.Timestamp,
                 new PointerPointProperties(RawInputModifiers.None, PointerUpdateKind.LeftButtonPressed),
                 e.KeyModifiers));
+#pragma warning restore CS0618
         }
 
-        private void EndMoveWindow(object sender, PointerReleasedEventArgs e)
+        private void EndMoveWindow(object _1, PointerReleasedEventArgs _2)
         {
             _pressedTitleBar = false;
         }
@@ -376,14 +384,6 @@ namespace SourceGit.Views
             GC.Collect();
         }
 
-        private void OnCommitSHAPointerPressed(object sender, PointerPressedEventArgs e)
-        {
-            if (sender is TextBlock txt && DataContext is ViewModels.Blame blame)
-                blame.NavigateToCommit(txt.Text);
-
-            e.Handled = true;
-        }
-
         private bool _pressedTitleBar = false;
     }
 }

src/Views/BranchCompare.axaml

@@ -2,14 +2,12 @@
                     xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
                     xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
                     xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
-                    xmlns:m="using:SourceGit.Models"
                     xmlns:vm="using:SourceGit.ViewModels"
                     xmlns:v="using:SourceGit.Views"
                     xmlns:c="using:SourceGit.Converters"
                     mc:Ignorable="d" d:DesignWidth="800" d:DesignHeight="450"
                     x:Class="SourceGit.Views.BranchCompare"
                     x:DataType="vm:BranchCompare"
-                    x:Name="me"
                     Icon="/App.ico"
                     Title="{DynamicResource Text.BranchCompare}"
                     MinWidth="1280" MinHeight="720"

src/Views/BranchCompare.axaml.cs

@@ -11,7 +11,7 @@ namespace SourceGit.Views
             InitializeComponent();
         }
 
-        private void MaximizeOrRestoreWindow(object sender, TappedEventArgs e)
+        private void MaximizeOrRestoreWindow(object _, TappedEventArgs e)
         {
             _pressedTitleBar = false;
 
@@ -23,18 +23,22 @@ namespace SourceGit.Views
             e.Handled = true;
         }
 
-        private void BeginMoveWindow(object sender, PointerPressedEventArgs e)
+        private void BeginMoveWindow(object _, PointerPressedEventArgs e)
         {
             if (e.ClickCount != 2)
                 _pressedTitleBar = true;
         }
 
-        private void MoveWindow(object sender, PointerEventArgs e)
+        private void MoveWindow(object _, PointerEventArgs e)
         {
-            if (!_pressedTitleBar)
+            if (!_pressedTitleBar || e.Source == null)
                 return;
 
             var visual = (Visual)e.Source;
+            if (visual == null)
+                return;
+
+#pragma warning disable CS0618
             BeginMoveDrag(new PointerPressedEventArgs(
                 e.Source,
                 e.Pointer,
@@ -43,9 +47,10 @@ namespace SourceGit.Views
                 e.Timestamp,
                 new PointerPointProperties(RawInputModifiers.None, PointerUpdateKind.LeftButtonPressed),
                 e.KeyModifiers));
+#pragma warning restore CS0618
         }
 
-        private void EndMoveWindow(object sender, PointerReleasedEventArgs e)
+        private void EndMoveWindow(object _1, PointerReleasedEventArgs _2)
         {
             _pressedTitleBar = false;
         }

src/Views/BranchTree.axaml.cs

@@ -97,7 +97,7 @@ namespace SourceGit.Views
                 DataContext is ViewModels.BranchTreeNode { IsBranch: false } node)
             {
                 var tree = this.FindAncestorOfType<BranchTree>();
-                tree.ToggleNodeIsExpanded(node);
+                tree?.ToggleNodeIsExpanded(node);
             }
 
             e.Handled = true;

src/Views/CaptionButtons.axaml

@@ -2,9 +2,6 @@
              xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
              xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
              xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
-             xmlns:v="using:SourceGit.Views"
-             xmlns:c="using:SourceGit.Converters"
-             xmlns:vm="using:SourceGit.ViewModels"
              mc:Ignorable="d" d:DesignWidth="800" d:DesignHeight="450"
              x:Class="SourceGit.Views.CaptionButtons">
   <StackPanel Orientation="Horizontal">

src/Views/CaptionButtons.axaml.cs

@@ -11,7 +11,7 @@ namespace SourceGit.Views
             InitializeComponent();
         }
 
-        private void MinimizeWindow(object sender, RoutedEventArgs e)
+        private void MinimizeWindow(object _1, RoutedEventArgs _2)
         {
             var window = this.FindAncestorOfType<Window>();
             if (window != null)
@@ -20,7 +20,7 @@ namespace SourceGit.Views
             }
         }
 
-        private void MaximizeOrRestoreWindow(object sender, RoutedEventArgs e)
+        private void MaximizeOrRestoreWindow(object _1, RoutedEventArgs _2)
         {
             var window = this.FindAncestorOfType<Window>();
             if (window != null)
@@ -29,7 +29,7 @@ namespace SourceGit.Views
             }
         }
 
-        private void CloseWindow(object sender, RoutedEventArgs e)
+        private void CloseWindow(object _1, RoutedEventArgs _2)
         {
             var window = this.FindAncestorOfType<Window>();
             if (window != null)

src/Views/CaptionButtonsMacOS.axaml.cs

@@ -11,7 +11,7 @@ namespace SourceGit.Views
             InitializeComponent();
         }
 
-        private void MinimizeWindow(object sender, RoutedEventArgs e)
+        private void MinimizeWindow(object _1, RoutedEventArgs _2)
         {
             var window = this.FindAncestorOfType<Window>();
             if (window != null)
@@ -20,7 +20,7 @@ namespace SourceGit.Views
             }
         }
 
-        private void MaximizeOrRestoreWindow(object sender, RoutedEventArgs e)
+        private void MaximizeOrRestoreWindow(object _1, RoutedEventArgs _2)
         {
             var window = this.FindAncestorOfType<Window>();
             if (window != null)
@@ -29,7 +29,7 @@ namespace SourceGit.Views
             }
         }
 
-        private void CloseWindow(object sender, RoutedEventArgs e)
+        private void CloseWindow(object _1, RoutedEventArgs _2)
         {
             var window = this.FindAncestorOfType<Window>();
             if (window != null)

src/Views/ChangeCollectionView.axaml

@@ -4,8 +4,8 @@
              xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
              xmlns:m="using:SourceGit.Models"
              xmlns:v="using:SourceGit.Views"
+             xmlns:vm="using:SourceGit.ViewModels"
              xmlns:c="using:SourceGit.Converters"
-             xmlns:ac="using:Avalonia.Controls.Converters"
              mc:Ignorable="d" d:DesignWidth="800" d:DesignHeight="450"
              x:Class="SourceGit.Views.ChangeCollectionView"
              x:Name="ThisControl">
@@ -29,12 +29,12 @@
   </UserControl.Styles>
   
   <UserControl.DataTemplates>
-    <DataTemplate DataType="v:ChangeCollectionAsTree">
+    <DataTemplate DataType="vm:ChangeCollectionAsTree">
       <v:ChangeCollectionContainer ItemsSource="{Binding Rows}"
                                    SelectionMode="{Binding #ThisControl.SelectionMode}"
                                    SelectionChanged="OnRowSelectionChanged">
         <ListBox.ItemTemplate>
-          <DataTemplate DataType="v:ChangeTreeNode">
+          <DataTemplate DataType="vm:ChangeTreeNode">
             <Grid ColumnDefinitions="16,Auto,Auto,*"
                   Margin="{Binding Depth, Converter={x:Static c:IntConverters.ToTreeMargin}}"
                   Background="Transparent"
@@ -62,7 +62,7 @@
       </v:ChangeCollectionContainer>
     </DataTemplate>
 
-    <DataTemplate DataType="v:ChangeCollectionAsGrid">
+    <DataTemplate DataType="vm:ChangeCollectionAsGrid">
       <v:ChangeCollectionContainer ItemsSource="{Binding Changes}"
                                    SelectionMode="{Binding #ThisControl.SelectionMode}"
                                    SelectionChanged="OnRowSelectionChanged">
@@ -90,7 +90,7 @@
       </v:ChangeCollectionContainer>
     </DataTemplate>
 
-    <DataTemplate DataType="v:ChangeCollectionAsList">
+    <DataTemplate DataType="vm:ChangeCollectionAsList">
       <v:ChangeCollectionContainer ItemsSource="{Binding Changes}"
                                    SelectionMode="{Binding #ThisControl.SelectionMode}"
                                    SelectionChanged="OnRowSelectionChanged">

src/Views/ChangeCollectionView.axaml.cs

@@ -2,153 +2,14 @@ using System;
 using System.Collections.Generic;
 
 using Avalonia;
-using Avalonia.Collections;
 using Avalonia.Controls;
 using Avalonia.Controls.Primitives;
 using Avalonia.Input;
 using Avalonia.Interactivity;
 using Avalonia.VisualTree;
 
-using CommunityToolkit.Mvvm.ComponentModel;
-
 namespace SourceGit.Views
 {
-    public class ChangeTreeNode : ObservableObject
-    {
-        public string FullPath { get; set; } = string.Empty;
-        public int Depth { get; private set; } = 0;
-        public Models.Change Change { get; set; } = null;
-        public List<ChangeTreeNode> Children { get; set; } = new List<ChangeTreeNode>();
-
-        public bool IsFolder
-        {
-            get => Change == null;
-        }
-
-        public bool IsExpanded
-        {
-            get => _isExpanded;
-            set => SetProperty(ref _isExpanded, value);
-        }
-
-        public ChangeTreeNode(Models.Change c, int depth)
-        {
-            FullPath = c.Path;
-            Depth = depth;
-            Change = c;
-            IsExpanded = false;
-        }
-
-        public ChangeTreeNode(string path, bool isExpanded, int depth)
-        {
-            FullPath = path;
-            Depth = depth;
-            IsExpanded = isExpanded;
-        }
-
-        public static List<ChangeTreeNode> Build(IList<Models.Change> changes, HashSet<string> folded)
-        {
-            var nodes = new List<ChangeTreeNode>();
-            var folders = new Dictionary<string, ChangeTreeNode>();
-
-            foreach (var c in changes)
-            {
-                var sepIdx = c.Path.IndexOf('/', StringComparison.Ordinal);
-                if (sepIdx == -1)
-                {
-                    nodes.Add(new ChangeTreeNode(c, 0));
-                }
-                else
-                {
-                    ChangeTreeNode lastFolder = null;
-                    var start = 0;
-                    var depth = 0;
-
-                    while (sepIdx != -1)
-                    {
-                        var folder = c.Path.Substring(0, sepIdx);
-                        if (folders.TryGetValue(folder, out var value))
-                        {
-                            lastFolder = value;
-                        }
-                        else if (lastFolder == null)
-                        {
-                            lastFolder = new ChangeTreeNode(folder, !folded.Contains(folder), depth);
-                            folders.Add(folder, lastFolder);
-                            InsertFolder(nodes, lastFolder);
-                        }
-                        else
-                        {
-                            var cur = new ChangeTreeNode(folder, !folded.Contains(folder), depth);
-                            folders.Add(folder, cur);
-                            InsertFolder(lastFolder.Children, cur);
-                            lastFolder = cur;
-                        }
-
-                        start = sepIdx + 1;
-                        depth++;
-                        sepIdx = c.Path.IndexOf('/', start);
-                    }
-
-                    lastFolder.Children.Add(new ChangeTreeNode(c, depth));
-                }
-            }
-
-            Sort(nodes);
-
-            folders.Clear();
-            return nodes;
-        }
-
-        private static void InsertFolder(List<ChangeTreeNode> collection, ChangeTreeNode subFolder)
-        {
-            for (int i = 0; i < collection.Count; i++)
-            {
-                if (!collection[i].IsFolder)
-                {
-                    collection.Insert(i, subFolder);
-                    return;
-                }
-            }
-
-            collection.Add(subFolder);
-        }
-
-        private static void Sort(List<ChangeTreeNode> nodes)
-        {
-            foreach (var node in nodes)
-            {
-                if (node.IsFolder)
-                    Sort(node.Children);
-            }
-
-            nodes.Sort((l, r) =>
-            {
-                if (l.IsFolder)
-                    return r.IsFolder ? string.Compare(l.FullPath, r.FullPath, StringComparison.Ordinal) : -1;
-                return r.IsFolder ? 1 : string.Compare(l.FullPath, r.FullPath, StringComparison.Ordinal);
-            });
-        }
-
-        private bool _isExpanded = true;
-    }
-
-    public class ChangeCollectionAsTree
-    {
-        public List<ChangeTreeNode> Tree { get; set; } = new List<ChangeTreeNode>();
-        public AvaloniaList<ChangeTreeNode> Rows { get; set; } = new AvaloniaList<ChangeTreeNode>();
-    }
-
-    public class ChangeCollectionAsGrid
-    {
-        public AvaloniaList<Models.Change> Changes { get; set; } = new AvaloniaList<Models.Change>();
-    }
-
-    public class ChangeCollectionAsList
-    {
-        public AvaloniaList<Models.Change> Changes { get; set; } = new AvaloniaList<Models.Change>();
-    }
-
     public class ChangeTreeNodeToggleButton : ToggleButton
     {
         protected override Type StyleKeyOverride => typeof(ToggleButton);
@@ -156,10 +17,10 @@ namespace SourceGit.Views
         protected override void OnPointerPressed(PointerPressedEventArgs e)
         {
             if (e.GetCurrentPoint(this).Properties.IsLeftButtonPressed &&
-                DataContext is ChangeTreeNode { IsFolder: true } node)
+                DataContext is ViewModels.ChangeTreeNode { IsFolder: true } node)
             {
                 var tree = this.FindAncestorOfType<ChangeCollectionView>();
-                tree.ToggleNodeIsExpanded(node);
+                tree?.ToggleNodeIsExpanded(node);
             }
 
             e.Handled = true;
@@ -180,7 +41,7 @@ namespace SourceGit.Views
     public partial class ChangeCollectionView : UserControl
     {
         public static readonly StyledProperty<bool> IsWorkingCopyChangeProperty =
-            AvaloniaProperty.Register<ChangeCollectionView, bool>(nameof(IsWorkingCopyChange), false);
+            AvaloniaProperty.Register<ChangeCollectionView, bool>(nameof(IsWorkingCopyChange));
 
         public bool IsWorkingCopyChange
         {
@@ -189,7 +50,7 @@ namespace SourceGit.Views
         }
 
         public static readonly StyledProperty<SelectionMode> SelectionModeProperty =
-            AvaloniaProperty.Register<ChangeCollectionView, SelectionMode>(nameof(SelectionMode), SelectionMode.Single);
+            AvaloniaProperty.Register<ChangeCollectionView, SelectionMode>(nameof(SelectionMode));
 
         public SelectionMode SelectionMode
         {
@@ -207,7 +68,7 @@ namespace SourceGit.Views
         }
 
         public static readonly StyledProperty<List<Models.Change>> ChangesProperty =
-            AvaloniaProperty.Register<ChangeCollectionView, List<Models.Change>>(nameof(Changes), null);
+            AvaloniaProperty.Register<ChangeCollectionView, List<Models.Change>>(nameof(Changes));
 
         public List<Models.Change> Changes
         {
@@ -216,7 +77,7 @@ namespace SourceGit.Views
         }
 
         public static readonly StyledProperty<List<Models.Change>> SelectedChangesProperty =
-            AvaloniaProperty.Register<ChangeCollectionView, List<Models.Change>>(nameof(SelectedChanges), null);
+            AvaloniaProperty.Register<ChangeCollectionView, List<Models.Change>>(nameof(SelectedChanges));
 
         public List<Models.Change> SelectedChanges
         {
@@ -238,9 +99,9 @@ namespace SourceGit.Views
             InitializeComponent();
         }
 
-        public void ToggleNodeIsExpanded(ChangeTreeNode node)
+        public void ToggleNodeIsExpanded(ViewModels.ChangeTreeNode node)
         {
-            if (_displayContext is ChangeCollectionAsTree tree)
+            if (_displayContext is ViewModels.ChangeCollectionAsTree tree)
             {
                 node.IsExpanded = !node.IsExpanded;
 
@@ -251,7 +112,7 @@ namespace SourceGit.Views
 
                 if (node.IsExpanded)
                 {
-                    var subrows = new List<ChangeTreeNode>();
+                    var subrows = new List<ViewModels.ChangeTreeNode>();
                     MakeTreeRows(subrows, node.Children);
                     tree.Rows.InsertRange(idx + 1, subrows);
                 }
@@ -290,7 +151,7 @@ namespace SourceGit.Views
                 if (ViewMode == Models.ChangeViewMode.Tree)
                 {
                     HashSet<string> oldFolded = new HashSet<string>();
-                    if (_displayContext is ChangeCollectionAsTree oldTree)
+                    if (_displayContext is ViewModels.ChangeCollectionAsTree oldTree)
                     {
                         foreach (var row in oldTree.Rows)
                         {
@@ -299,23 +160,23 @@ namespace SourceGit.Views
                         }
                     }
 
-                    var tree = new ChangeCollectionAsTree();
-                    tree.Tree = ChangeTreeNode.Build(changes, oldFolded);
+                    var tree = new ViewModels.ChangeCollectionAsTree();
+                    tree.Tree = ViewModels.ChangeTreeNode.Build(changes, oldFolded);
 
-                    var rows = new List<ChangeTreeNode>();
+                    var rows = new List<ViewModels.ChangeTreeNode>();
                     MakeTreeRows(rows, tree.Tree);
                     tree.Rows.AddRange(rows);
                     _displayContext = tree;
                 }
                 else if (ViewMode == Models.ChangeViewMode.Grid)
                 {
-                    var grid = new ChangeCollectionAsGrid();
+                    var grid = new ViewModels.ChangeCollectionAsGrid();
                     grid.Changes.AddRange(changes);
                     _displayContext = grid;
                 }
                 else
                 {
-                    var list = new ChangeCollectionAsList();
+                    var list = new ViewModels.ChangeCollectionAsList();
                     list.Changes.AddRange(changes);
                     _displayContext = list;
                 }
@@ -339,13 +200,13 @@ namespace SourceGit.Views
                 {
                     list.SelectedItem = null;
                 }
-                else if (_displayContext is ChangeCollectionAsTree tree)
+                else if (_displayContext is ViewModels.ChangeCollectionAsTree tree)
                 {
                     var sets = new HashSet<Models.Change>();
                     foreach (var c in selected)
                         sets.Add(c);
 
-                    var nodes = new List<ChangeTreeNode>();
+                    var nodes = new List<ViewModels.ChangeTreeNode>();
                     foreach (var row in tree.Rows)
                     {
                         if (row.Change != null && sets.Contains(row.Change))
@@ -366,7 +227,7 @@ namespace SourceGit.Views
         private void OnRowDoubleTapped(object sender, TappedEventArgs e)
         {
             var grid = sender as Grid;
-            if (grid.DataContext is ChangeTreeNode node)
+            if (grid?.DataContext is ViewModels.ChangeTreeNode node)
             {
                 if (node.IsFolder)
                 {
@@ -381,32 +242,35 @@ namespace SourceGit.Views
                     RaiseEvent(new RoutedEventArgs(ChangeDoubleTappedEvent));
                 }
             }
-            else if (grid.DataContext is Models.Change)
+            else if (grid?.DataContext is Models.Change)
             {
                 RaiseEvent(new RoutedEventArgs(ChangeDoubleTappedEvent));
             }
         }
 
-        private void OnRowSelectionChanged(object sender, SelectionChangedEventArgs e)
+        private void OnRowSelectionChanged(object sender, SelectionChangedEventArgs _)
         {
             if (_disableSelectionChangingEvent)
                 return;
 
             _disableSelectionChangingEvent = true;
             var selected = new List<Models.Change>();
-            var list = sender as ListBox;
+            if (sender is ListBox { SelectedItems: not null } list)
+            {
                 foreach (var item in list.SelectedItems)
                 {
                     if (item is Models.Change c)
                         selected.Add(c);
-                else if (item is ChangeTreeNode node)
+                    else if (item is ViewModels.ChangeTreeNode node)
                         CollectChangesInNode(selected, node);
                 }
+            }
+
             TrySetSelected(selected);
             _disableSelectionChangingEvent = false;
         }
 
-        private void MakeTreeRows(List<ChangeTreeNode> rows, List<ChangeTreeNode> nodes)
+        private void MakeTreeRows(List<ViewModels.ChangeTreeNode> rows, List<ViewModels.ChangeTreeNode> nodes)
         {
             foreach (var node in nodes)
             {
@@ -419,7 +283,7 @@ namespace SourceGit.Views
             }
         }
 
-        private void CollectChangesInNode(List<Models.Change> outs, ChangeTreeNode node)
+        private void CollectChangesInNode(List<Models.Change> outs, ViewModels.ChangeTreeNode node)
         {
             if (node.IsFolder)
             {

src/Views/ChangeStatusIcon.cs

@@ -87,7 +87,7 @@ namespace SourceGit.Views
 
             var typeface = new Typeface("fonts:SourceGit#JetBrains Mono");
 
-            IBrush background = null;
+            IBrush background;
             string indicator;
             if (IsWorkingCopyChange)
             {

src/Views/ChangeViewModeSwitcher.axaml

@@ -4,7 +4,6 @@
              xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
              xmlns:m="using:SourceGit.Models"
              xmlns:v="using:SourceGit.Views"
-             xmlns:vm="using:SourceGit.ViewModels"
              xmlns:c="using:SourceGit.Converters"
              mc:Ignorable="d" d:DesignWidth="800" d:DesignHeight="450"
              x:Class="SourceGit.Views.ChangeViewModeSwitcher"

src/Views/CherryPick.axaml

@@ -2,7 +2,6 @@
              xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
              xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
              xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
-             xmlns:m="using:SourceGit.Models"
              xmlns:vm="using:SourceGit.ViewModels"
              xmlns:c="using:SourceGit.Converters"
              mc:Ignorable="d" d:DesignWidth="800" d:DesignHeight="450"
@@ -13,12 +12,12 @@
                Classes="bold"
                Text="{DynamicResource Text.CherryPick}"/>
     <Grid Margin="0,16,0,0" RowDefinitions="32,32" ColumnDefinitions="100,*">
-      <TextBlock Grid.Column="0"
+      <TextBlock Grid.Row="0" Grid.Column="0"
                  HorizontalAlignment="Right" VerticalAlignment="Center"
                  Margin="0,0,8,0"
                  Text="{DynamicResource Text.CherryPick.Commit}"/>
 
-      <Grid Grid.Column="1" ColumnDefinitions="Auto,Auto,*">
+      <Grid Grid.Row="0" Grid.Column="1" ColumnDefinitions="Auto,Auto,*">
         <Path Grid.Column="0" Width="14" Height="14" Margin="0,8,0,0" Data="{StaticResource Icons.Commit}"/>
         <TextBlock Grid.Column="1" Classes="monospace" VerticalAlignment="Center" Text="{Binding Target.SHA, Converter={x:Static c:StringConverters.ToShortSHA}}" Foreground="DarkOrange" Margin="8,0,0,0"/>
         <TextBlock Grid.Column="2" VerticalAlignment="Center" Text="{Binding Target.Subject}" Margin="4,0,0,0" TextTrimming="CharacterEllipsis"/>

src/Views/Cleanup.axaml

@@ -2,9 +2,7 @@
              xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
              xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
              xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
-             xmlns:m="using:SourceGit.Models"
              xmlns:vm="using:SourceGit.ViewModels"
-             xmlns:c="using:SourceGit.Converters"
              mc:Ignorable="d" d:DesignWidth="500" d:DesignHeight="450"
              x:Class="SourceGit.Views.Cleanup"
              x:DataType="vm:Cleanup">

src/Views/Clone.axaml.cs

@@ -11,7 +11,7 @@ namespace SourceGit.Views
             InitializeComponent();
         }
 
-        private async void SelectParentFolder(object sender, RoutedEventArgs e)
+        private async void SelectParentFolder(object _, RoutedEventArgs e)
         {
             var options = new FolderPickerOpenOptions() { AllowMultiple = false };
             var toplevel = TopLevel.GetTopLevel(this);
@@ -25,13 +25,18 @@ namespace SourceGit.Views
             e.Handled = true;
         }
 
-        private async void SelectSSHKey(object sender, RoutedEventArgs e)
+        private async void SelectSSHKey(object _, RoutedEventArgs e)
         {
-            var options = new FilePickerOpenOptions() { AllowMultiple = false, FileTypeFilter = [new FilePickerFileType("SSHKey") { Patterns = ["*.*"] }] };
             var toplevel = TopLevel.GetTopLevel(this);
             if (toplevel == null)
                 return;
 
+            var options = new FilePickerOpenOptions()
+            {
+                AllowMultiple = false,
+                FileTypeFilter = [new FilePickerFileType("SSHKey") { Patterns = ["*.*"] }]
+            };
+
             var selected = await toplevel.StorageProvider.OpenFilePickerAsync(options);
             if (selected.Count == 1)
                 TxtSshKey.Text = selected[0].Path.LocalPath;

src/Views/CommitBaseInfo.axaml.cs

@@ -31,8 +31,12 @@ namespace SourceGit.Views
 
         private void OnParentSHAPressed(object sender, PointerPressedEventArgs e)
         {
-            if (DataContext is ViewModels.CommitDetail detail && CanNavigate)
-                detail.NavigateTo((sender as Control).DataContext as string);
+            if (sender is Control { DataContext: string sha } &&
+                DataContext is ViewModels.CommitDetail detail &&
+                CanNavigate)
+            {
+                detail.NavigateTo(sha);
+            }
 
             e.Handled = true;
         }

src/Views/CommitChanges.axaml

@@ -4,7 +4,6 @@
              xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
              xmlns:vm="using:SourceGit.ViewModels"
              xmlns:v="using:SourceGit.Views"
-             xmlns:c="using:SourceGit.Converters"
              mc:Ignorable="d" d:DesignWidth="800" d:DesignHeight="450"
              x:Class="SourceGit.Views.CommitChanges"
              x:DataType="vm:CommitDetail">

src/Views/CommitChanges.axaml.cs

@@ -11,14 +11,12 @@ namespace SourceGit.Views
 
         private void OnChangeContextRequested(object sender, ContextRequestedEventArgs e)
         {
-            if (DataContext is ViewModels.CommitDetail vm)
-            {
-                var selected = (sender as ChangeCollectionView)?.SelectedChanges;
-                if (selected != null && selected.Count == 1)
+            if (sender is ChangeCollectionView { SelectedChanges: { } selected } view &&
+                selected.Count == 1 &&
+                DataContext is ViewModels.CommitDetail vm)
             {
                 var menu = vm.CreateChangeContextMenu(selected[0]);
-                    (sender as Control)?.OpenContextMenu(menu);
-                }
+                view.OpenContextMenu(menu);
             }
 
             e.Handled = true;

src/Views/CommitMessageTextBox.axaml.cs

@@ -117,7 +117,7 @@ namespace SourceGit.Views
             }
         }
 
-        private async void OnSubjectTextBoxPreviewKeyDown(object sender, KeyEventArgs e)
+        private async void OnSubjectTextBoxPreviewKeyDown(object _, KeyEventArgs e)
         {
             if (e.Key == Key.Enter || (e.Key == Key.Right && SubjectEditor.CaretIndex == Subject.Length))
             {
@@ -157,7 +157,7 @@ namespace SourceGit.Views
             }
         }
 
-        private void OnDescriptionTextBoxPreviewKeyDown(object sender, KeyEventArgs e)
+        private void OnDescriptionTextBoxPreviewKeyDown(object _, KeyEventArgs e)
         {
             if ((e.Key == Key.Back || e.Key == Key.Left) && DescriptionEditor.CaretIndex == 0)
             {

src/Views/CreateBranch.axaml

@@ -15,11 +15,11 @@
                Classes="bold"
                Text="{DynamicResource Text.CreateBranch.Title}"/>
     <Grid Margin="0,16,0,0" RowDefinitions="32,32,32,32" ColumnDefinitions="140,*">
-      <TextBlock Grid.Column="0"
+      <TextBlock Grid.Row="0" Grid.Column="0"
                  HorizontalAlignment="Right" VerticalAlignment="Center"
                  Margin="0,0,8,0"
                  Text="{DynamicResource Text.CreateBranch.BasedOn}"/>
-      <ContentControl Grid.Column="1" Content="{Binding BasedOn}">
+      <ContentControl Grid.Row="0" Grid.Column="1" Content="{Binding BasedOn}">
         <ContentControl.DataTemplates>
           <DataTemplate DataType="m:Branch">
             <StackPanel Orientation="Horizontal">

src/Views/DeleteMultipleBranches.axaml

@@ -2,10 +2,7 @@
              xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
              xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
              xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
-             xmlns:m="using:SourceGit.Models"
              xmlns:vm="using:SourceGit.ViewModels"
-             xmlns:v="using:SourceGit.Views"
-             xmlns:c="using:SourceGit.Converters"
              mc:Ignorable="d" d:DesignWidth="800" d:DesignHeight="450"
              x:Class="SourceGit.Views.DeleteMultipleBranches"
              x:DataType="vm:DeleteMultipleBranches">

src/Views/DeleteSubmodule.axaml

@@ -2,7 +2,6 @@
              xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
              xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
              xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
-             xmlns:c="using:SourceGit.Converters"
              xmlns:vm="using:SourceGit.ViewModels"
              mc:Ignorable="d" d:DesignWidth="800" d:DesignHeight="450"
              x:Class="SourceGit.Views.DeleteSubmodule"
@@ -12,8 +11,7 @@
                Classes="bold"
                Text="{DynamicResource Text.DeleteSubmodule}"/>
     <StackPanel Orientation="Horizontal" Margin="0,16,0,0" Height="28" HorizontalAlignment="Center">
-      <TextBlock Grid.Column="0"
-                 HorizontalAlignment="Right" VerticalAlignment="Center"
+      <TextBlock HorizontalAlignment="Right" VerticalAlignment="Center"
                  Margin="0,0,8,0"
                  Text="{DynamicResource Text.DeleteSubmodule.Path}"/>
       <Path Width="12" Height="12"

src/Views/DeleteTag.axaml

@@ -11,12 +11,12 @@
                Classes="bold"
                Text="{DynamicResource Text.DeleteTag}"/>
     <Grid Margin="0,16,0,0" RowDefinitions="32,32" ColumnDefinitions="150,*">
-      <TextBlock Grid.Column="0"
+      <TextBlock Grid.Row="0" Grid.Column="0"
                  HorizontalAlignment="Right" VerticalAlignment="Center"
                  Margin="0,0,8,0"
                  Text="{DynamicResource Text.DeleteTag.Tag}"/>
 
-      <StackPanel Grid.Column="1" Orientation="Horizontal">
+      <StackPanel Grid.Row="0" Grid.Column="1" Orientation="Horizontal">
         <Path Width="14" Height="14" Data="{StaticResource Icons.Tag}"/>
         <TextBlock Text="{Binding Target.Name}" Margin="8,0,0,0"/>
       </StackPanel>

src/Views/EditRemote.axaml

@@ -2,10 +2,8 @@
              xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
              xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
              xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
-             xmlns:m="using:SourceGit.Models"
              xmlns:vm="using:SourceGit.ViewModels"
              xmlns:v="using:SourceGit.Views"
-             xmlns:c="using:SourceGit.Converters"
              mc:Ignorable="d" d:DesignWidth="500" d:DesignHeight="450"
              x:Class="SourceGit.Views.EditRemote"
              x:DataType="vm:EditRemote">
@@ -44,7 +42,7 @@
                  Text="{DynamicResource Text.SSHKey}"
                  IsVisible="{Binding UseSSH}"/>
       <TextBox Grid.Row="2" Grid.Column="1"
-               x:Name="txtSSHKey"
+               x:Name="TxtSshKey"
                Height="26"
                CornerRadius="3"
                IsVisible="{Binding UseSSH}"

src/Views/EditRemote.axaml.cs

@@ -11,15 +11,16 @@ namespace SourceGit.Views
             InitializeComponent();
         }
 
-        private async void SelectSSHKey(object sender, RoutedEventArgs e)
+        private async void SelectSSHKey(object _, RoutedEventArgs e)
         {
-            var options = new FilePickerOpenOptions() { AllowMultiple = false, FileTypeFilter = [new FilePickerFileType("SSHKey") { Patterns = ["*.*"] }] };
             var toplevel = TopLevel.GetTopLevel(this);
+            if (toplevel == null)
+                return;
+
+            var options = new FilePickerOpenOptions() { AllowMultiple = false, FileTypeFilter = [new FilePickerFileType("SSHKey") { Patterns = ["*.*"] }] };
             var selected = await toplevel.StorageProvider.OpenFilePickerAsync(options);
             if (selected.Count == 1)
-            {
-                txtSSHKey.Text = selected[0].Path.LocalPath;
-            }
+                TxtSshKey.Text = selected[0].Path.LocalPath;
 
             e.Handled = true;
         }

src/Views/FastForwardWithoutCheckout.axaml

@@ -3,7 +3,6 @@
              xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
              xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
              xmlns:vm="using:SourceGit.ViewModels"
-             xmlns:c="using:SourceGit.Converters"
              mc:Ignorable="d" d:DesignWidth="500" d:DesignHeight="450"
              x:Class="SourceGit.Views.FastForwardWithoutCheckout"
              x:DataType="vm:FastForwardWithoutCheckout">

src/Views/Fetch.axaml

@@ -4,7 +4,6 @@
              xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
              xmlns:m="using:SourceGit.Models"
              xmlns:vm="using:SourceGit.ViewModels"
-             xmlns:c="using:SourceGit.Converters"
              mc:Ignorable="d" d:DesignWidth="500" d:DesignHeight="450"
              x:Class="SourceGit.Views.Fetch"
              x:DataType="vm:Fetch">
@@ -13,11 +12,11 @@
                Classes="bold"
                Text="{DynamicResource Text.Fetch.Title}"/>
     <Grid Margin="0,16,0,0" RowDefinitions="32,32,32,32" ColumnDefinitions="120,*">
-      <TextBlock Grid.Column="0"
+      <TextBlock Grid.Row="0" Grid.Column="0"
                  HorizontalAlignment="Right" VerticalAlignment="Center"
                  Margin="0,0,8,0"
                  Text="{DynamicResource Text.Fetch.Remote}"/>
-      <ComboBox Grid.Column="1"
+      <ComboBox Grid.Row="0" Grid.Column="1"
                 Height="28" Padding="8,0"
                 VerticalAlignment="Center" HorizontalAlignment="Stretch"
                 ItemsSource="{Binding Remotes}"

src/Views/FileHistories.axaml.cs

@@ -11,7 +11,7 @@ namespace SourceGit.Views
             InitializeComponent();
         }
 
-        private void MaximizeOrRestoreWindow(object sender, TappedEventArgs e)
+        private void MaximizeOrRestoreWindow(object _, TappedEventArgs e)
         {
             _pressedTitleBar = false;
 
@@ -23,18 +23,22 @@ namespace SourceGit.Views
             e.Handled = true;
         }
 
-        private void BeginMoveWindow(object sender, PointerPressedEventArgs e)
+        private void BeginMoveWindow(object _, PointerPressedEventArgs e)
         {
             if (e.ClickCount != 2)
                 _pressedTitleBar = true;
         }
 
-        private void MoveWindow(object sender, PointerEventArgs e)
+        private void MoveWindow(object _, PointerEventArgs e)
         {
-            if (!_pressedTitleBar)
+            if (!_pressedTitleBar || e.Source == null)
                 return;
 
             var visual = (Visual)e.Source;
+            if (visual == null)
+                return;
+
+#pragma warning disable CS0618
             BeginMoveDrag(new PointerPressedEventArgs(
                 e.Source,
                 e.Pointer,
@@ -43,9 +47,10 @@ namespace SourceGit.Views
                 e.Timestamp,
                 new PointerPointProperties(RawInputModifiers.None, PointerUpdateKind.LeftButtonPressed),
                 e.KeyModifiers));
+#pragma warning restore CS0618
         }
 
-        private void EndMoveWindow(object sender, PointerReleasedEventArgs e)
+        private void EndMoveWindow(object _1, PointerReleasedEventArgs _2)
         {
             _pressedTitleBar = false;
         }

src/Views/GitFlowFinish.axaml

@@ -2,9 +2,7 @@
              xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
              xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
              xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
-             xmlns:m="using:SourceGit.Models"
              xmlns:vm="using:SourceGit.ViewModels"
-             xmlns:c="using:SourceGit.Converters"
              mc:Ignorable="d" d:DesignWidth="500" d:DesignHeight="450"
              x:Class="SourceGit.Views.GitFlowFinish"
              x:DataType="vm:GitFlowFinish">
@@ -22,11 +20,11 @@
                Text="{DynamicResource Text.GitFlow.FinishHotfix}"
                IsVisible="{Binding IsHotfix}"/>
     <Grid Margin="0,16,0,0" RowDefinitions="32,32" ColumnDefinitions="150,*">
-      <TextBlock Grid.Column="0"
+      <TextBlock Grid.Row="0" Grid.Column="0"
                  HorizontalAlignment="Right" VerticalAlignment="Center"
                  Margin="0,0,8,0"
                  Text="{DynamicResource Text.GitFlow.FinishTarget}"/>
-      <StackPanel Grid.Column="1" Orientation="Horizontal">
+      <StackPanel Grid.Row="0" Grid.Column="1" Orientation="Horizontal">
         <Path Width="14" Height="14" Data="{StaticResource Icons.Branch}"/>
         <TextBlock Text="{Binding Branch.Name}" Margin="8,0,0,0"/>
       </StackPanel>

src/Views/GitFlowStart.axaml

@@ -2,10 +2,8 @@
              xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
              xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
              xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
-             xmlns:m="using:SourceGit.Models"
              xmlns:vm="using:SourceGit.ViewModels"
              xmlns:v="using:SourceGit.Views"
-             xmlns:c="using:SourceGit.Converters"
              mc:Ignorable="d" d:DesignWidth="500" d:DesignHeight="450"
              x:Class="SourceGit.Views.GitFlowStart"
              x:DataType="vm:GitFlowStart">

src/Views/Histories.axaml

@@ -12,7 +12,7 @@
   <v:LayoutableGrid RowDefinitions="*,3,*" ColumnDefinitions="*,3,*"
                     UseHorizontal="{Binding Source={x:Static vm:Preference.Instance}, Path=UseTwoColumnsLayoutInHistories}">
     <Grid Grid.Row="0" Grid.Column="0" Grid.ColumnSpan="3">
-      <DataGrid x:Name="commitDataGrid"
+      <DataGrid x:Name="CommitDataGrid"
                 Background="{DynamicResource Brush.Contents}"
                 ItemsSource="{Binding Commits}"
                 SelectionMode="Extended"
@@ -171,7 +171,7 @@
         </DataGrid.Columns>
       </DataGrid>
 
-      <v:CommitGraph x:Name="commitGraph"
+      <v:CommitGraph x:Name="CommitGraph"
                      Graph="{Binding Graph}"
                      DotBrush="{DynamicResource Brush.Contents}"
                      HorizontalAlignment="Stretch" VerticalAlignment="Stretch"

src/Views/Histories.axaml.cs

@@ -11,7 +11,7 @@ namespace SourceGit.Views
     public class LayoutableGrid : Grid
     {
         public static readonly StyledProperty<bool> UseHorizontalProperty =
-            AvaloniaProperty.Register<LayoutableGrid, bool>(nameof(UseHorizontal), false);
+            AvaloniaProperty.Register<LayoutableGrid, bool>(nameof(UseHorizontal));
 
         public bool UseHorizontal
         {
@@ -96,10 +96,12 @@ namespace SourceGit.Views
         {
             base.Render(context);
 
-            var parent = this.FindAncestorOfType<Histories>();
+            var grid = this.FindAncestorOfType<Histories>()?.CommitDataGrid;
+            if (grid == null)
+                return;
+
             var graph = Graph;
-            var grid = parent.commitDataGrid;
-            if (graph == null || grid == null)
+            if (graph == null)
                 return;
 
             var rowsPresenter = grid.FindDescendantOfType<DataGridRowsPresenter>();
@@ -111,8 +113,7 @@ namespace SourceGit.Views
             double startY = 0;
             foreach (var child in rowsPresenter.Children)
             {
-                var row = child as DataGridRow;
-                if (row.IsVisible && row.Bounds.Top <= 0 && row.Bounds.Top > -rowHeight)
+                if (child is DataGridRow { IsVisible: true, Bounds.Top: <= 0 } row && row.Bounds.Top > -rowHeight)
                 {
                     var test = rowHeight * row.GetIndex() - row.Bounds.Top;
                     if (startY < test)
@@ -239,7 +240,7 @@ namespace SourceGit.Views
     public partial class Histories : UserControl
     {
         public static readonly StyledProperty<long> NavigationIdProperty =
-            AvaloniaProperty.Register<Histories, long>(nameof(NavigationId), 0);
+            AvaloniaProperty.Register<Histories, long>(nameof(NavigationId));
 
         public long NavigationId
         {
@@ -252,7 +253,7 @@ namespace SourceGit.Views
             NavigationIdProperty.Changed.AddClassHandler<Histories>((h, _) =>
             {
                 // Force scroll selected item (current head) into view. see issue #58
-                var datagrid = h.commitDataGrid;
+                var datagrid = h.CommitDataGrid;
                 if (datagrid != null && datagrid.SelectedItems.Count == 1)
                     datagrid.ScrollIntoView(datagrid.SelectedItems[0], null);
             });
@@ -263,16 +264,16 @@ namespace SourceGit.Views
             InitializeComponent();
         }
 
-        private void OnCommitDataGridLayoutUpdated(object sender, EventArgs e)
+        private void OnCommitDataGridLayoutUpdated(object _1, EventArgs _2)
         {
-            commitGraph.InvalidateVisual();
+            CommitGraph.InvalidateVisual();
         }
 
-        private void OnCommitDataGridSelectionChanged(object sender, SelectionChangedEventArgs e)
+        private void OnCommitDataGridSelectionChanged(object _, SelectionChangedEventArgs e)
         {
             if (DataContext is ViewModels.Histories histories)
             {
-                histories.Select(commitDataGrid.SelectedItems);
+                histories.Select(CommitDataGrid.SelectedItems);
             }
             e.Handled = true;
         }

src/Views/Hotkeys.axaml.cs

@@ -10,12 +10,12 @@ namespace SourceGit.Views
             InitializeComponent();
         }
 
-        private void BeginMoveWindow(object sender, PointerPressedEventArgs e)
+        private void BeginMoveWindow(object _, PointerPressedEventArgs e)
         {
             BeginMoveDrag(e);
         }
 
-        private void CloseWindow(object sender, RoutedEventArgs e)
+        private void CloseWindow(object _1, RoutedEventArgs _2)
         {
             Close();
         }

src/Views/ImageDiffView.axaml

@@ -3,7 +3,6 @@
              xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
              xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
              xmlns:m="using:SourceGit.Models"
-             xmlns:vm="using:SourceGit.ViewModels"
              xmlns:v="using:SourceGit.Views"
              xmlns:c="using:SourceGit.Converters"
              mc:Ignorable="d" d:DesignWidth="800" d:DesignHeight="450"
@@ -157,16 +156,7 @@
                   Margin="0"
                   MinHeight="0"
                   Foreground="{DynamicResource Brush.Border1}"
-                  Value="0.5">
-            <Slider.Resources>
-              <Thickness x:Key="SliderTopHeaderMargin">0,0,0,4</Thickness>
-              <GridLength x:Key="SliderPreContentMargin">0</GridLength>
-              <GridLength x:Key="SliderPostContentMargin">0</GridLength>
-              <CornerRadius x:Key="SliderThumbCornerRadius">8</CornerRadius>
-              <x:Double x:Key="SliderHorizontalThumbWidth">16</x:Double>
-              <x:Double x:Key="SliderHorizontalThumbHeight">16</x:Double>
-            </Slider.Resources>
-          </Slider>
+                  Value="0.5"/>
 
           <StackPanel Grid.Column="2" Orientation="Horizontal" VerticalAlignment="Top" Margin="8,0,0,0">
             <TextBlock Classes="monospace" Text="NEW"/>

src/Views/ImageDiffView.axaml.cs

@@ -64,7 +64,7 @@ namespace SourceGit.Views
         }
 
         public static readonly StyledProperty<Bitmap> OldImageProperty =
-            AvaloniaProperty.Register<ImagesSwipeControl, Bitmap>(nameof(OldImage), null);
+            AvaloniaProperty.Register<ImagesSwipeControl, Bitmap>(nameof(OldImage));
 
         public Bitmap OldImage
         {
@@ -73,7 +73,7 @@ namespace SourceGit.Views
         }
 
         public static readonly StyledProperty<Bitmap> NewImageProperty =
-            AvaloniaProperty.Register<ImagesSwipeControl, Bitmap>(nameof(NewImage), null);
+            AvaloniaProperty.Register<ImagesSwipeControl, Bitmap>(nameof(NewImage));
 
         public Bitmap NewImage
         {
@@ -185,13 +185,9 @@ namespace SourceGit.Views
 
         private Size GetDesiredSize(Size img, Size available)
         {
-            var w = available.Width;
-            var h = available.Height;
-
             var sw = available.Width / img.Width;
             var sh = available.Height / img.Height;
             var scale = Math.Min(sw, sh);
-
             return new Size(scale * img.Width, scale * img.Height);
         }
 
@@ -211,7 +207,7 @@ namespace SourceGit.Views
         }
 
         public static readonly StyledProperty<Bitmap> OldImageProperty =
-            AvaloniaProperty.Register<ImageBlendControl, Bitmap>(nameof(OldImage), null);
+            AvaloniaProperty.Register<ImageBlendControl, Bitmap>(nameof(OldImage));
 
         public Bitmap OldImage
         {
@@ -220,7 +216,7 @@ namespace SourceGit.Views
         }
 
         public static readonly StyledProperty<Bitmap> NewImageProperty =
-            AvaloniaProperty.Register<ImageBlendControl, Bitmap>(nameof(NewImage), null);
+            AvaloniaProperty.Register<ImageBlendControl, Bitmap>(nameof(NewImage));
 
         public Bitmap NewImage
         {
@@ -294,13 +290,9 @@ namespace SourceGit.Views
 
         private Size GetDesiredSize(Size img, Size available)
         {
-            var w = available.Width;
-            var h = available.Height;
-
             var sw = available.Width / img.Width;
             var sh = available.Height / img.Height;
             var scale = Math.Min(sw, sh);
-
             return new Size(scale * img.Width, scale * img.Height);
         }
 

src/Views/InitGitFlow.axaml

@@ -2,10 +2,8 @@
              xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
              xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
              xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
-             xmlns:m="using:SourceGit.Models"
              xmlns:vm="using:SourceGit.ViewModels"
              xmlns:v="using:SourceGit.Views"
-             xmlns:c="using:SourceGit.Converters"
              mc:Ignorable="d" d:DesignWidth="500" d:DesignHeight="450"
              x:Class="SourceGit.Views.InitGitFlow"
              x:DataType="vm:InitGitFlow">

src/Views/InteractiveRebase.axaml.cs

@@ -11,12 +11,12 @@ namespace SourceGit.Views
             InitializeComponent();
         }
 
-        private void BeginMoveWindow(object sender, PointerPressedEventArgs e)
+        private void BeginMoveWindow(object _, PointerPressedEventArgs e)
         {
             BeginMoveDrag(e);
         }
 
-        private void CloseWindow(object sender, RoutedEventArgs e)
+        private void CloseWindow(object _1, RoutedEventArgs _2)
         {
             Close();
         }
@@ -41,12 +41,10 @@ namespace SourceGit.Views
 
         private void OnDataGridKeyDown(object sender, KeyEventArgs e)
         {
-            var datagrid = sender as DataGrid;
-            var item = datagrid.SelectedItem as ViewModels.InteractiveRebaseItem;
+            var item = (sender as DataGrid)?.SelectedItem as ViewModels.InteractiveRebaseItem;
             if (item == null)
                 return;
 
-            var vm = DataContext as ViewModels.InteractiveRebase;
             if (e.Key == Key.P)
                 item.SetAction(Models.InteractiveRebaseAction.Pick);
             else if (e.Key == Key.E)
@@ -61,11 +59,14 @@ namespace SourceGit.Views
                 item.SetAction(Models.InteractiveRebaseAction.Drop);
         }
 
-        private async void StartJobs(object sender, RoutedEventArgs e)
+        private async void StartJobs(object _1, RoutedEventArgs _2)
         {
+            var vm = DataContext as ViewModels.InteractiveRebase;
+            if (vm == null)
+                return;
+
             Running.IsVisible = true;
             Running.IsIndeterminate = true;
-            var vm = DataContext as ViewModels.InteractiveRebase;
             await vm.Start();
             Running.IsIndeterminate = false;
             Running.IsVisible = false;

src/Views/LFSLocks.axaml

@@ -3,7 +3,6 @@
                     xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
                     xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
                     xmlns:vm="using:SourceGit.ViewModels"
-                    xmlns:c="using:SourceGit.Converters"
                     xmlns:v="using:SourceGit.Views"
                     mc:Ignorable="d" d:DesignWidth="800" d:DesignHeight="450"
                     x:Class="SourceGit.Views.LFSLocks"

src/Views/LFSLocks.axaml.cs

@@ -11,12 +11,12 @@ namespace SourceGit.Views
             InitializeComponent();
         }
 
-        private void BeginMoveWindow(object sender, PointerPressedEventArgs e)
+        private void BeginMoveWindow(object _, PointerPressedEventArgs e)
         {
             BeginMoveDrag(e);
         }
 
-        private void CloseWindow(object sender, RoutedEventArgs e)
+        private void CloseWindow(object _1, RoutedEventArgs _2)
         {
             Close();
         }

src/Views/LFSTrackCustomPattern.axaml

@@ -2,10 +2,8 @@
              xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
              xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
              xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
-             xmlns:m="using:SourceGit.Models"
              xmlns:vm="using:SourceGit.ViewModels"
              xmlns:v="using:SourceGit.Views"
-             xmlns:c="using:SourceGit.Converters"
              mc:Ignorable="d" d:DesignWidth="800" d:DesignHeight="450"
              x:Class="SourceGit.Views.LFSTrackCustomPattern"
              x:DataType="vm:LFSTrackCustomPattern">

src/Views/Launcher.axaml.cs

@@ -29,7 +29,7 @@ namespace SourceGit.Views
 
             if (change.Property == WindowStateProperty && MainLayout != null)
             {
-                var state = (WindowState)change.NewValue;
+                var state = (WindowState)change.NewValue!;
                 if (state == WindowState.Maximized)
                     MainLayout.RowDefinitions[0].Height = new GridLength(OperatingSystem.IsMacOS() ? 34 : 30);
                 else
@@ -42,6 +42,8 @@ namespace SourceGit.Views
         protected override void OnKeyDown(KeyEventArgs e)
         {
             var vm = DataContext as ViewModels.Launcher;
+            if (vm == null)
+                return;
 
             // Ctrl+Shift+P opens preference dialog (macOS use hotkeys in system menu bar)
             if (!OperatingSystem.IsMacOS() && e.KeyModifiers == (KeyModifiers.Control | KeyModifiers.Shift) && e.Key == Key.P)
@@ -60,27 +62,31 @@ namespace SourceGit.Views
                     e.Handled = true;
                     return;
                 }
-                else if (e.Key == Key.T)
+
+                if (e.Key == Key.T)
                 {
                     vm.AddNewTab();
                     e.Handled = true;
                     return;
                 }
-                else if ((OperatingSystem.IsMacOS() && e.KeyModifiers.HasFlag(KeyModifiers.Alt) && e.Key == Key.Right) ||
+
+                if ((OperatingSystem.IsMacOS() && e.KeyModifiers.HasFlag(KeyModifiers.Alt) && e.Key == Key.Right) ||
                     (!OperatingSystem.IsMacOS() && !e.KeyModifiers.HasFlag(KeyModifiers.Shift) && e.Key == Key.Tab))
                 {
                     vm.GotoNextTab();
                     e.Handled = true;
                     return;
                 }
-                else if ((OperatingSystem.IsMacOS() && e.KeyModifiers.HasFlag(KeyModifiers.Alt) && e.Key == Key.Left) ||
+
+                if ((OperatingSystem.IsMacOS() && e.KeyModifiers.HasFlag(KeyModifiers.Alt) && e.Key == Key.Left) ||
                     (!OperatingSystem.IsMacOS() && e.KeyModifiers.HasFlag(KeyModifiers.Shift) && e.Key == Key.Tab))
                 {
                     vm.GotoPrevTab();
                     e.Handled = true;
                     return;
                 }
-                else if (vm.ActivePage.Data is ViewModels.Repository repo)
+
+                if (vm.ActivePage.Data is ViewModels.Repository repo)
                 {
                     if (e.Key == Key.D1 || e.Key == Key.NumPad1)
                     {
@@ -88,25 +94,29 @@ namespace SourceGit.Views
                         e.Handled = true;
                         return;
                     }
-                    else if (e.Key == Key.D2 || e.Key == Key.NumPad2)
+
+                    if (e.Key == Key.D2 || e.Key == Key.NumPad2)
                     {
                         repo.SelectedViewIndex = 1;
                         e.Handled = true;
                         return;
                     }
-                    else if (e.Key == Key.D3 || e.Key == Key.NumPad3)
+
+                    if (e.Key == Key.D3 || e.Key == Key.NumPad3)
                     {
                         repo.SelectedViewIndex = 2;
                         e.Handled = true;
                         return;
                     }
-                    else if (e.Key == Key.F)
+
+                    if (e.Key == Key.F)
                     {
                         repo.IsSearching = true;
                         e.Handled = true;
                         return;
                     }
-                    else if (e.Key == Key.H && e.KeyModifiers.HasFlag(KeyModifiers.Shift))
+
+                    if (e.Key == Key.H && e.KeyModifiers.HasFlag(KeyModifiers.Shift))
                     {
                         repo.IsSearching = false;
                         e.Handled = true;
@@ -140,12 +150,12 @@ namespace SourceGit.Views
             pref.Layout.LauncherHeight = Height;
 
             var vm = DataContext as ViewModels.Launcher;
-            vm.Quit();
+            vm?.Quit();
 
             base.OnClosing(e);
         }
 
-        private void OnTitleBarDoubleTapped(object sender, TappedEventArgs e)
+        private void OnTitleBarDoubleTapped(object _, TappedEventArgs e)
         {
             _pressedTitleBar = false;
 
@@ -157,18 +167,22 @@ namespace SourceGit.Views
             e.Handled = true;
         }
 
-        private void BeginMoveWindow(object sender, PointerPressedEventArgs e)
+        private void BeginMoveWindow(object _, PointerPressedEventArgs e)
         {
             if (e.ClickCount != 2)
                 _pressedTitleBar = true;
         }
 
-        private void MoveWindow(object sender, PointerEventArgs e)
+        private void MoveWindow(object _, PointerEventArgs e)
         {
-            if (!_pressedTitleBar)
+            if (!_pressedTitleBar || e.Source == null)
                 return;
 
             var visual = (Visual)e.Source;
+            if (visual == null)
+                return;
+
+#pragma warning disable CS0618
             BeginMoveDrag(new PointerPressedEventArgs(
                 e.Source,
                 e.Pointer,
@@ -177,14 +191,15 @@ namespace SourceGit.Views
                 e.Timestamp,
                 new PointerPointProperties(RawInputModifiers.None, PointerUpdateKind.LeftButtonPressed),
                 e.KeyModifiers));
+#pragma warning restore CS0618
         }
 
-        private void EndMoveWindow(object sender, PointerReleasedEventArgs e)
+        private void EndMoveWindow(object _1, PointerReleasedEventArgs _2)
         {
             _pressedTitleBar = false;
         }
 
-        private void OnPopupSure(object sender, RoutedEventArgs e)
+        private void OnPopupSure(object _, RoutedEventArgs e)
         {
             if (DataContext is ViewModels.Launcher vm)
                 vm.ActivePage.ProcessPopup();
@@ -192,7 +207,7 @@ namespace SourceGit.Views
             e.Handled = true;
         }
 
-        private void OnPopupCancel(object sender, RoutedEventArgs e)
+        private void OnPopupCancel(object _, RoutedEventArgs e)
         {
             if (DataContext is ViewModels.Launcher vm)
                 vm.ActivePage.CancelPopup();

src/Views/LauncherTabBar.axaml

@@ -3,9 +3,7 @@
              xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
              xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
              xmlns:vm="using:SourceGit.ViewModels"
-             xmlns:m="using:SourceGit.Models"
              xmlns:c="using:SourceGit.Converters"
-             xmlns:v="using:SourceGit.Views"
              mc:Ignorable="d" d:DesignWidth="800" d:DesignHeight="450"
              x:Class="SourceGit.Views.LauncherTabBar"
              x:DataType="vm:Launcher">

src/Views/LauncherTabBar.axaml.cs

@@ -36,6 +36,9 @@ namespace SourceGit.Views
                     continue;
 
                 var container = LauncherTabsList.ContainerFromIndex(i);
+                if (container == null)
+                    continue;
+
                 var containerEndX = container.Bounds.Right;
                 if (containerEndX < startX || containerEndX > endX)
                     continue;
@@ -45,6 +48,9 @@ namespace SourceGit.Views
             }
 
             var selected = LauncherTabsList.ContainerFromIndex(selectedIdx);
+            if (selected == null)
+                return;
+
             var activeStartX = selected.Bounds.X;
             var activeEndX = activeStartX + selected.Bounds.Width;
             if (activeStartX > endX + 5 || activeEndX < startX - 5)
@@ -52,10 +58,11 @@ namespace SourceGit.Views
 
             var geo = new StreamGeometry();
             var angle = Math.PI / 2;
-            var x = 0.0;
             var y = height + 0.25;
             using (var ctx = geo.Open())
             {
+                double x;
+
                 var drawLeftX = activeStartX - startX + LauncherTabsScroller.Bounds.X;
                 var drawRightX = activeEndX - startX + LauncherTabsScroller.Bounds.X;
                 if (drawLeftX < LauncherTabsScroller.Bounds.X)
@@ -103,11 +110,11 @@ namespace SourceGit.Views
             }
 
             var fill = this.FindResource("Brush.ToolBar") as IBrush;
-            var stroke = new Pen(this.FindResource("Brush.Border0") as IBrush, 1);
+            var stroke = new Pen(this.FindResource("Brush.Border0") as IBrush);
             context.DrawGeometry(fill, stroke, geo);
         }
 
-        private void ScrollTabs(object sender, PointerWheelEventArgs e)
+        private void ScrollTabs(object _, PointerWheelEventArgs e)
         {
             if (!e.KeyModifiers.HasFlag(KeyModifiers.Shift))
             {
@@ -119,19 +126,19 @@ namespace SourceGit.Views
             }
         }
 
-        private void ScrollTabsLeft(object sender, RoutedEventArgs e)
+        private void ScrollTabsLeft(object _, RoutedEventArgs e)
         {
             LauncherTabsScroller.LineLeft();
             e.Handled = true;
         }
 
-        private void ScrollTabsRight(object sender, RoutedEventArgs e)
+        private void ScrollTabsRight(object _, RoutedEventArgs e)
         {
             LauncherTabsScroller.LineRight();
             e.Handled = true;
         }
 
-        private void OnTabsLayoutUpdated(object sender, EventArgs e)
+        private void OnTabsLayoutUpdated(object _1, EventArgs _2)
         {
             if (LauncherTabsScroller.Extent.Width > LauncherTabsScroller.Viewport.Width)
             {
@@ -149,7 +156,7 @@ namespace SourceGit.Views
             InvalidateVisual();
         }
 
-        private void OnTabsSelectionChanged(object sender, SelectionChangedEventArgs e)
+        private void OnTabsSelectionChanged(object _1, SelectionChangedEventArgs _2)
         {
             InvalidateVisual();
         }
@@ -166,22 +173,24 @@ namespace SourceGit.Views
 
         private void OnPointerPressedTab(object sender, PointerPressedEventArgs e)
         {
-            var border = sender as Border;
-            var point = e.GetCurrentPoint(border);
-            if (point.Properties.IsMiddleButtonPressed)
+            if (sender is Border border)
             {
-                var vm = DataContext as ViewModels.Launcher;
-                vm.CloseTab(border.DataContext as ViewModels.LauncherPage);
+                var point = e.GetCurrentPoint(border);
+                if (point.Properties.IsMiddleButtonPressed && border.DataContext is ViewModels.LauncherPage page)
+                {
+                    (DataContext as ViewModels.Launcher)?.CloseTab(page);
                     e.Handled = true;
-                return;
                 }
-
+                else
+                {
                     _pressedTab = true;
                     _startDragTab = false;
-            _pressedTabPosition = e.GetPosition(sender as Border);
+                    _pressedTabPosition = e.GetPosition(border);
+                }
+            }
         }
 
-        private void OnPointerReleasedTab(object sender, PointerReleasedEventArgs e)
+        private void OnPointerReleasedTab(object _1, PointerReleasedEventArgs _2)
         {
             _pressedTab = false;
             _startDragTab = false;
@@ -189,7 +198,7 @@ namespace SourceGit.Views
 
         private void OnPointerMovedOverTab(object sender, PointerEventArgs e)
         {
-            if (_pressedTab && !_startDragTab && sender is Border border)
+            if (_pressedTab && !_startDragTab && sender is Border { DataContext: ViewModels.LauncherPage page } border)
             {
                 var delta = e.GetPosition(border) - _pressedTabPosition;
                 var sizeSquired = delta.X * delta.X + delta.Y * delta.Y;
@@ -199,7 +208,7 @@ namespace SourceGit.Views
                 _startDragTab = true;
 
                 var data = new DataObject();
-                data.Set("MovedTab", border.DataContext);
+                data.Set("MovedTab", page);
                 DragDrop.DoDragDrop(e, data, DragDropEffects.Move);
             }
             e.Handled = true;
@@ -207,14 +216,11 @@ namespace SourceGit.Views
 
         private void DropTab(object sender, DragEventArgs e)
         {
-            if (e.Data.Contains("MovedTab") && sender is Border border)
+            if (e.Data.Get("MovedTab") is ViewModels.LauncherPage moved &&
+                sender is Border { DataContext: ViewModels.LauncherPage to } &&
+                to != moved)
             {
-                var to = border.DataContext as ViewModels.LauncherPage;
-                var moved = e.Data.Get("MovedTab") as ViewModels.LauncherPage;
-                if (to != null && moved != null && to != moved && DataContext is ViewModels.Launcher vm)
-                {
-                    vm.MoveTab(moved, to);
-                }
+                (DataContext as ViewModels.Launcher)?.MoveTab(moved, to);
             }
 
             _pressedTab = false;

src/Views/LoadingIcon.axaml

@@ -3,6 +3,5 @@
              xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
              xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
              mc:Ignorable="d" d:DesignWidth="800" d:DesignHeight="450"
-             xmlns:m="using:SourceGit.Models"
              x:Class="SourceGit.Views.LoadingIcon">
 </UserControl>

src/Views/LoadingIcon.axaml.cs

@@ -2,7 +2,6 @@ using Avalonia;
 using Avalonia.Controls;
 using Avalonia.Controls.Shapes;
 using Avalonia.Interactivity;
-using Avalonia.Media;
 
 namespace SourceGit.Views
 {
@@ -43,11 +42,7 @@ namespace SourceGit.Views
 
         private void StartAnim()
         {
-            Content = new Path()
-            {
-                Data = this.FindResource("Icons.Loading") as StreamGeometry,
-                Classes = { "rotating" },
-            };
+            Content = new Path() { Classes = { "rotating" } };
         }
 
         private void StopAnim()

src/Views/NameHighlightedTextBlock.cs

@@ -1,5 +1,4 @@
-using System;
-using System.Globalization;
+using System.Globalization;
 
 using Avalonia;
 using Avalonia.Controls;
@@ -62,7 +61,7 @@ namespace SourceGit.Views
             if (string.IsNullOrEmpty(text))
                 return base.MeasureOverride(availableSize);
 
-            var typeface = new Typeface(FontFamily, FontStyle.Normal, FontWeight.Normal, FontStretch.Normal);
+            var typeface = new Typeface(FontFamily);
             var formatted = new FormattedText(
                     Text,
                     CultureInfo.CurrentCulture,
@@ -80,11 +79,11 @@ namespace SourceGit.Views
             if (string.IsNullOrEmpty(text))
                 return;
 
-            var normalTypeface = new Typeface(FontFamily, FontStyle.Normal, FontWeight.Normal, FontStretch.Normal);
-            var underlinePen = new Pen(Foreground, 1);
+            var normalTypeface = new Typeface(FontFamily);
+            var underlinePen = new Pen(Foreground);
             var offsetX = 0.0;
 
-            var parts = text.Split('$', StringSplitOptions.None);
+            var parts = text.Split('$');
             var isName = false;
             foreach (var part in parts)
             {

src/Views/PopupRunningStatus.axaml

@@ -6,23 +6,23 @@
              xmlns:c="using:SourceGit.Converters"
              mc:Ignorable="d" d:DesignWidth="800" d:DesignHeight="450"
              x:Class="SourceGit.Views.PopupRunningStatus"
-             x:Name="me">
+             x:Name="ThisControl">
   <StackPanel Orientation="Vertical">
     <Rectangle Height="1" HorizontalAlignment="Stretch" Fill="{DynamicResource Brush.Border1}" />
     
     <StackPanel Orientation="Horizontal" Margin="0,8">
-      <ContentPresenter x:Name="icon" Width="12" Height="12"/>
+      <ContentPresenter x:Name="Icon" Width="12" Height="12"/>
       <TextBlock Margin="6,0,0,0" FontSize="14" FontWeight="Bold" Text="{DynamicResource Text.Running}"/>
     </StackPanel>
     
-    <TextBlock x:Name="txtDesc"
+    <TextBlock x:Name="TxtDesc"
                HorizontalAlignment="Stretch"
                TextWrapping="Wrap"
                FontSize="{Binding Source={x:Static vm:Preference.Instance}, Path=DefaultFontSize, Converter={x:Static c:DoubleConverters.Decrease}}"
                FontStyle="Italic"
-               Text="{Binding #me.Description}"/>
+               Text="{Binding #ThisControl.Description}"/>
     
-    <ProgressBar x:Name="progressBar"
+    <ProgressBar x:Name="ProgressBar"
                  Margin="0,8,0,0"
                  HorizontalAlignment="Stretch"
                  Background="{DynamicResource Brush.FG2}" Foreground="{DynamicResource Brush.Accent}"

src/Views/PopupRunningStatus.axaml.cs

@@ -2,7 +2,6 @@ using Avalonia;
 using Avalonia.Controls;
 using Avalonia.Controls.Shapes;
 using Avalonia.Interactivity;
-using Avalonia.Media;
 
 namespace SourceGit.Views
 {
@@ -51,20 +50,16 @@ namespace SourceGit.Views
 
         private void StartAnim()
         {
-            icon.Content = new Path()
-            {
-                Data = this.FindResource("Icons.Waiting") as StreamGeometry,
-                Classes = { "waiting" },
-            };
-            progressBar.IsIndeterminate = true;
+            Icon.Content = new Path() { Classes = { "waiting" } };
+            ProgressBar.IsIndeterminate = true;
         }
 
         private void StopAnim()
         {
-            if (icon.Content is Path path)
+            if (Icon.Content is Path path)
                 path.Classes.Clear();
-            icon.Content = null;
-            progressBar.IsIndeterminate = false;
+            Icon.Content = null;
+            ProgressBar.IsIndeterminate = false;
         }
     }
 }

src/Views/Preference.axaml

@@ -5,13 +5,12 @@
                     xmlns:sys="clr-namespace:System;assembly=mscorlib"
                     xmlns:m="using:SourceGit.Models"
                     xmlns:c="using:SourceGit.Converters"
-                    xmlns:ac="using:Avalonia.Controls.Converters"
                     xmlns:vm="using:SourceGit.ViewModels"
                     xmlns:v="using:SourceGit.Views"
                     mc:Ignorable="d" d:DesignWidth="800" d:DesignHeight="450"
                     x:Class="SourceGit.Views.Preference"
                     x:DataType="vm:Preference"
-                    x:Name="me"
+                    x:Name="ThisControl"
                     Icon="/App.ico"
                     Title="{DynamicResource Text.Preference}"
                     Width="600" SizeToContent="Height"
@@ -123,16 +122,7 @@
                       IsSnapToTickEnabled="True"
                       VerticalAlignment="Center"
                       Foreground="{DynamicResource Brush.Border1}"
-                      Value="{Binding MaxHistoryCommits, Mode=TwoWay}">
-                <Slider.Resources>
-                  <Thickness x:Key="SliderTopHeaderMargin">0,0,0,4</Thickness>
-                  <GridLength x:Key="SliderPreContentMargin">0</GridLength>
-                  <GridLength x:Key="SliderPostContentMargin">0</GridLength>
-                  <CornerRadius x:Key="SliderThumbCornerRadius">8</CornerRadius>
-                  <x:Double x:Key="SliderHorizontalThumbWidth">16</x:Double>
-                  <x:Double x:Key="SliderHorizontalThumbHeight">16</x:Double>
-                </Slider.Resources>
-              </Slider>
+                      Value="{Binding MaxHistoryCommits, Mode=TwoWay}"/>
 
               <TextBlock Grid.Column="1"
                          HorizontalAlignment="Right" VerticalAlignment="Center"
@@ -186,7 +176,7 @@
                       MinHeight="28"
                       Padding="8,0"
                       HorizontalAlignment="Stretch"
-                      ItemsSource="{Binding #me.InstalledFonts}"
+                      ItemsSource="{Binding #ThisControl.InstalledFonts}"
                       SelectedItem="{Binding DefaultFont, Mode=TwoWay}">
               <ComboBox.ItemTemplate>
                 <DataTemplate DataType="FontFamily">
@@ -205,7 +195,7 @@
                       MinHeight="28"
                       Padding="8,0"
                       HorizontalAlignment="Stretch"
-                      ItemsSource="{Binding #me.InstalledMonospaceFonts}"
+                      ItemsSource="{Binding #ThisControl.InstalledMonospaceFonts}"
                       SelectedItem="{Binding MonospaceFont, Mode=TwoWay}">
               <ComboBox.ItemTemplate>
                 <DataTemplate DataType="FontFamily">
@@ -273,12 +263,12 @@
             <StackPanel Grid.Row="1" Grid.Column="1" Orientation="Horizontal">
               <TextBlock Classes="monospace" 
                          Margin="0,0,8,0"
-                         Text="{Binding #me.GitVersion}" 
-                         IsVisible="{Binding #me.GitVersion, Converter={x:Static StringConverters.IsNotNullOrEmpty}}"/>
+                         Text="{Binding #ThisControl.GitVersion}" 
+                         IsVisible="{Binding #ThisControl.GitVersion, Converter={x:Static StringConverters.IsNotNullOrEmpty}}"/>
 
               <Border Background="Transparent"
                       ToolTip.Tip="{DynamicResource Text.Preference.Git.Invalid}"
-                      IsVisible="{Binding #me.GitVersion, Converter={x:Static c:StringConverters.UnderRecommendGitVersion}}">
+                      IsVisible="{Binding #ThisControl.GitVersion, Converter={x:Static c:StringConverters.UnderRecommendGitVersion}}">
                 <Path Width="14" Height="14" Data="{StaticResource Icons.Error}" Fill="Red"/>
               </Border>
             </StackPanel>
@@ -344,7 +334,7 @@
             <TextBox Grid.Row="4" Grid.Column="1"
                      Height="28"
                      CornerRadius="3"
-                     Text="{Binding #me.DefaultUser, Mode=TwoWay}"
+                     Text="{Binding #ThisControl.DefaultUser, Mode=TwoWay}"
                      Watermark="{DynamicResource Text.Preference.Git.User.Placeholder}"/>
 
             <TextBlock Grid.Row="5" Grid.Column="0"
@@ -354,7 +344,7 @@
             <TextBox Grid.Row="5" Grid.Column="1"
                      Height="28"
                      CornerRadius="3"
-                     Text="{Binding #me.DefaultEmail, Mode=TwoWay}"
+                     Text="{Binding #ThisControl.DefaultEmail, Mode=TwoWay}"
                      Watermark="{DynamicResource Text.Preference.Git.Email.Placeholder}"/>
 
             <TextBlock Grid.Row="6" Grid.Column="0"
@@ -366,7 +356,7 @@
                       Padding="8,0"
                       HorizontalAlignment="Stretch"
                       ItemsSource="{Binding Source={x:Static m:CRLFMode.Supported}}"
-                      SelectedItem="{Binding #me.CRLFMode, Mode=TwoWay}">
+                      SelectedItem="{Binding #ThisControl.CRLFMode, Mode=TwoWay}">
               <ComboBox.ItemTemplate>
                 <DataTemplate x:DataType="{x:Type m:CRLFMode}">
                   <Grid ColumnDefinitions="64,*">
@@ -410,10 +400,6 @@
             <TextBlock Classes="tab_header" Text="{DynamicResource Text.Preference.GPG}"/>
           </TabItem.Header>
 
-          <TabItem.Resources>
-            <ac:EnumToBoolConverter x:Key="EnumToBoolConverter"/>
-          </TabItem.Resources>
-
           <Grid Margin="8" RowDefinitions="32,Auto,32,32,32" ColumnDefinitions="Auto,*">
             <TextBlock Grid.Row="0" Grid.Column="0"
                        Text="{DynamicResource Text.Preference.GPG.Format}"
@@ -424,7 +410,7 @@
                       Padding="8,0"
                       HorizontalAlignment="Stretch"
                       ItemsSource="{Binding Source={x:Static m:GPGFormat.Supported}}"
-                      SelectedItem="{Binding #me.GPGFormat, Mode=TwoWay}">
+                      SelectedItem="{Binding #ThisControl.GPGFormat, Mode=TwoWay}">
               <ComboBox.ItemTemplate>
                 <DataTemplate x:DataType="{x:Type m:GPGFormat}">
                   <Grid ColumnDefinitions="Auto,*">
@@ -439,13 +425,13 @@
                        Text="{DynamicResource Text.Preference.GPG.Path}"
                        HorizontalAlignment="Right"
                        Margin="0,0,16,0"
-                       IsVisible="{Binding #me.GPGFormat.NeedFindProgram}"/>
+                       IsVisible="{Binding #ThisControl.GPGFormat.NeedFindProgram}"/>
             <TextBox Grid.Row="1" Grid.Column="1"
                      Height="28"
                      CornerRadius="3"
-                     Text="{Binding #me.GPGExecutableFile, Mode=TwoWay}"
+                     Text="{Binding #ThisControl.GPGExecutableFile, Mode=TwoWay}"
                      Watermark="{DynamicResource Text.Preference.GPG.Path.Placeholder}"
-                     IsVisible="{Binding #me.GPGFormat.NeedFindProgram}">
+                     IsVisible="{Binding #ThisControl.GPGFormat.NeedFindProgram}">
               <TextBox.InnerRightContent>
                 <Button Classes="icon_button" Width="30" Height="30" Click="SelectGPGExecutable">
                   <Path Data="{StaticResource Icons.Folder.Open}" Fill="{DynamicResource Brush.FG1}"/>
@@ -460,16 +446,16 @@
             <TextBox Grid.Row="2" Grid.Column="1"
                      Height="28"
                      CornerRadius="3"
-                     Text="{Binding #me.GPGUserKey, Mode=TwoWay}"
+                     Text="{Binding #ThisControl.GPGUserKey, Mode=TwoWay}"
                      Watermark="{DynamicResource Text.Preference.GPG.UserKey.Placeholder}"/>
 
             <CheckBox Grid.Row="3" Grid.Column="1"
                       Content="{DynamicResource Text.Preference.GPG.CommitEnabled}"
-                      IsChecked="{Binding #me.EnableGPGCommitSigning, Mode=TwoWay}"/>
+                      IsChecked="{Binding #ThisControl.EnableGPGCommitSigning, Mode=TwoWay}"/>
 
             <CheckBox Grid.Row="4" Grid.Column="1"
                       Content="{DynamicResource Text.Preference.GPG.TagEnabled}"
-                      IsChecked="{Binding #me.EnableGPGTagSigning, Mode=TwoWay}"/>
+                      IsChecked="{Binding #ThisControl.EnableGPGTagSigning, Mode=TwoWay}"/>
           </Grid>
         </TabItem>
 

src/Views/Preference.axaml.cs

@@ -18,13 +18,11 @@ namespace SourceGit.Views
         public AvaloniaList<FontFamily> InstalledFonts
         {
             get;
-            private set;
         }
 
         public AvaloniaList<FontFamily> InstalledMonospaceFonts
         {
             get;
-            private set;
         }
 
         public string DefaultUser
@@ -133,11 +131,9 @@ namespace SourceGit.Views
                                 typeface,
                                 12,
                                 Brushes.White);
-                    if (testI.Width == testW.Width)
-                    {
+                    if (Math.Abs(testI.Width - testW.Width) < 0.0001)
                         sysMonoFonts.Add(font);
                 }
-                }
 
                 Dispatcher.UIThread.Post(() => InstalledMonospaceFonts.AddRange(sysMonoFonts));
             });
@@ -188,12 +184,12 @@ namespace SourceGit.Views
             }
         }
 
-        private void BeginMoveWindow(object sender, PointerPressedEventArgs e)
+        private void BeginMoveWindow(object _, PointerPressedEventArgs e)
         {
             BeginMoveDrag(e);
         }
 
-        private void CloseWindow(object sender, RoutedEventArgs e)
+        private void CloseWindow(object _1, RoutedEventArgs _2)
         {
             var config = new Commands.Config(null).ListAll();
             SetIfChanged(config, "user.name", DefaultUser);
@@ -210,7 +206,7 @@ namespace SourceGit.Views
             Close();
         }
 
-        private async void SelectThemeOverrideFile(object sender, RoutedEventArgs e)
+        private async void SelectThemeOverrideFile(object _, RoutedEventArgs e)
         {
             var options = new FilePickerOpenOptions()
             {
@@ -227,7 +223,7 @@ namespace SourceGit.Views
             e.Handled = true;
         }
 
-        private async void SelectGitExecutable(object sender, RoutedEventArgs e)
+        private async void SelectGitExecutable(object _, RoutedEventArgs e)
         {
             var pattern = OperatingSystem.IsWindows() ? "git.exe" : "git";
             var options = new FilePickerOpenOptions()
@@ -246,7 +242,7 @@ namespace SourceGit.Views
             e.Handled = true;
         }
 
-        private async void SelectDefaultCloneDir(object sender, RoutedEventArgs e)
+        private async void SelectDefaultCloneDir(object _1, RoutedEventArgs _2)
         {
             var options = new FolderPickerOpenOptions() { AllowMultiple = false };
             var selected = await StorageProvider.OpenFolderPickerAsync(options);
@@ -256,7 +252,7 @@ namespace SourceGit.Views
             }
         }
 
-        private async void SelectGPGExecutable(object sender, RoutedEventArgs e)
+        private async void SelectGPGExecutable(object _1, RoutedEventArgs _2)
         {
             var patterns = new List<string>();
             if (OperatingSystem.IsWindows())
@@ -277,13 +273,12 @@ namespace SourceGit.Views
             }
         }
 
-        private async void SelectExternalMergeTool(object sender, RoutedEventArgs e)
+        private async void SelectExternalMergeTool(object _1, RoutedEventArgs _2)
         {
             var type = ViewModels.Preference.Instance.ExternalMergeToolType;
             if (type < 0 || type >= Models.ExternalMerger.Supported.Count)
             {
                 ViewModels.Preference.Instance.ExternalMergeToolType = 0;
-                type = 0;
                 return;
             }
 

src/Views/Pull.axaml

@@ -4,7 +4,6 @@
              xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
              xmlns:m="using:SourceGit.Models"
              xmlns:vm="using:SourceGit.ViewModels"
-             xmlns:c="using:SourceGit.Converters"
              xmlns:ac="using:Avalonia.Controls.Converters"
              mc:Ignorable="d" d:DesignWidth="500" d:DesignHeight="450"
              x:Class="SourceGit.Views.Pull"
@@ -14,11 +13,11 @@
                Classes="bold"
                Text="{DynamicResource Text.Pull.Title}"/>
     <Grid Margin="0,16,0,0" RowDefinitions="32,32,32,32,32,32" ColumnDefinitions="140,*">
-      <TextBlock Grid.Column="0"
+      <TextBlock Grid.Row="0" Grid.Column="0"
                  HorizontalAlignment="Right" VerticalAlignment="Center"
                  Margin="0,0,8,0"
                  Text="{DynamicResource Text.Pull.Remote}"/>
-      <ComboBox Grid.Column="1"
+      <ComboBox Grid.Row="0" Grid.Column="1"
                 Height="28" Padding="8,0"
                 VerticalAlignment="Center" HorizontalAlignment="Stretch"
                 ItemsSource="{Binding Remotes}"

src/Views/Push.axaml

@@ -4,7 +4,6 @@
              xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
              xmlns:m="using:SourceGit.Models"
              xmlns:vm="using:SourceGit.ViewModels"
-             xmlns:c="using:SourceGit.Converters"
              mc:Ignorable="d" d:DesignWidth="500" d:DesignHeight="450"
              x:Class="SourceGit.Views.Push"
              x:DataType="vm:Push">
@@ -14,11 +13,11 @@
                Text="{DynamicResource Text.Push.Title}"/>
 
     <Grid Margin="0,16,0,0" RowDefinitions="32,32,32,Auto,32,32" ColumnDefinitions="150,*">
-      <TextBlock Grid.Column="0"
+      <TextBlock Grid.Row="0" Grid.Column="0"
                  HorizontalAlignment="Right" VerticalAlignment="Center"
                  Margin="0,0,8,0"
                  Text="{DynamicResource Text.Push.Local}"/>
-      <ComboBox Grid.Column="1"
+      <ComboBox Grid.Row="0" Grid.Column="1"
                 Height="28" Padding="8,0"
                 VerticalAlignment="Center" HorizontalAlignment="Stretch"
                 ItemsSource="{Binding LocalBranches}"

src/Views/PushTag.axaml

@@ -4,7 +4,6 @@
              xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
              xmlns:m="using:SourceGit.Models"
              xmlns:vm="using:SourceGit.ViewModels"
-             xmlns:c="using:SourceGit.Converters"
              mc:Ignorable="d" d:DesignWidth="800" d:DesignHeight="450"
              x:Class="SourceGit.Views.PushTag"
              x:DataType="vm:PushTag">
@@ -13,12 +12,12 @@
                Classes="bold"
                Text="{DynamicResource Text.PushTag}"/>
     <Grid Margin="0,16,0,0" RowDefinitions="32,32,32" ColumnDefinitions="120,*">
-      <TextBlock Grid.Column="0"
+      <TextBlock Grid.Row="0" Grid.Column="0"
                  HorizontalAlignment="Right" VerticalAlignment="Center"
                  Margin="0,0,8,0"
                  Text="{DynamicResource Text.PushTag.Tag}"/>
 
-      <StackPanel Grid.Column="1" Orientation="Horizontal">
+      <StackPanel Grid.Row="0" Grid.Column="1" Orientation="Horizontal">
         <Path Width="14" Height="14" Data="{StaticResource Icons.Tag}"/>
         <TextBlock Text="{Binding Target.Name}" Margin="8,0,0,0"/>
       </StackPanel>

src/Views/RemoveWorktree.axaml

@@ -2,10 +2,7 @@
              xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
              xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
              xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
-             xmlns:m="using:SourceGit.Models"
              xmlns:vm="using:SourceGit.ViewModels"
-             xmlns:v="using:SourceGit.Views"
-             xmlns:c="using:SourceGit.Converters"
              mc:Ignorable="d" d:DesignWidth="800" d:DesignHeight="450"
              x:Class="SourceGit.Views.RemoveWorktree"
              x:DataType="vm:RemoveWorktree">

src/Views/RenameBranch.axaml

@@ -2,10 +2,8 @@
              xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
              xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
              xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
-             xmlns:m="using:SourceGit.Models"
              xmlns:vm="using:SourceGit.ViewModels"
              xmlns:v="using:SourceGit.Views"
-             xmlns:c="using:SourceGit.Converters"
              mc:Ignorable="d" d:DesignWidth="800" d:DesignHeight="450"
              x:Class="SourceGit.Views.RenameBranch"
              x:DataType="vm:RenameBranch">
@@ -14,11 +12,11 @@
                Classes="bold"
                Text="{DynamicResource Text.RenameBranch}"/>
     <Grid Margin="0,16,0,0" RowDefinitions="32,32" ColumnDefinitions="120,*">
-      <TextBlock Grid.Column="0"
+      <TextBlock Grid.Row="0" Grid.Column="0"
                  HorizontalAlignment="Right" VerticalAlignment="Center"
                  Margin="0,0,8,0"
                  Text="{DynamicResource Text.RenameBranch.Target}"/>
-      <StackPanel Grid.Column="1" Orientation="Horizontal">
+      <StackPanel Grid.Row="0" Grid.Column="1" Orientation="Horizontal">
         <Path Width="14" Height="14" Data="{StaticResource Icons.Branch}"/>
         <TextBlock Text="{Binding Target.Name}" Margin="8,0,0,0" />
       </StackPanel>

src/Views/Repository.axaml

@@ -231,13 +231,13 @@
             </TextBox.InnerRightContent>
           </TextBox>
 
-          <Grid Grid.Row="2" x:Name="leftSidebarGroups" Margin="0,4,0,0" RowDefinitions="28,Auto,28,Auto,28,Auto,28,Auto,28,Auto">
+          <Grid Grid.Row="2" x:Name="LeftSidebarGroups" Margin="0,4,0,0" RowDefinitions="28,Auto,28,Auto,28,Auto,28,Auto,28,Auto">
             <!-- Local Branches -->
             <ToggleButton Grid.Row="0" Classes="group_expander" IsChecked="{Binding IsLocalBranchGroupExpanded, Mode=TwoWay}">
               <TextBlock Classes="group_header_label" Margin="0" Text="{DynamicResource Text.Repository.LocalBranches}"/>
             </ToggleButton>
             <v:BranchTree Grid.Row="1"
-                          x:Name="localBranchTree"
+                          x:Name="LocalBranchTree"
                           Height="0"
                           Margin="8,0,4,0"
                           Nodes="{Binding LocalBranchTrees}"
@@ -255,7 +255,7 @@
               </Grid>
             </ToggleButton>
             <v:BranchTree Grid.Row="3"
-                          x:Name="remoteBranchTree"
+                          x:Name="RemoteBranchTree"
                           Height="0"
                           Margin="8,0,4,0"
                           Nodes="{Binding RemoteBranchTrees}"
@@ -274,7 +274,7 @@
               </Grid>
             </ToggleButton>
             <DataGrid Grid.Row="5"
-                      x:Name="tagsList"
+                      x:Name="TagsList"
                       Height="0"
                       Margin="8,0,4,0"
                       Background="Transparent"
@@ -343,8 +343,7 @@
                       <ToggleButton Classes="filter"
                                     Margin="0,0,8,0"
                                     Background="Transparent"
-                                    Checked="OnToggleTagFilter"
-                                    Unchecked="OnToggleTagFilter"
+                                    IsCheckedChanged="OnTagFilterIsCheckedChanged"
                                     IsChecked="{Binding IsFiltered}"
                                     ToolTip.Tip="{DynamicResource Text.Filter}"/>
                     </DataTemplate>
@@ -378,7 +377,7 @@
               </Grid>
             </ToggleButton>
             <DataGrid Grid.Row="7"
-                      x:Name="submoduleList"
+                      x:Name="SubmoduleList"
                       Height="0"
                       Margin="8,0,4,0"
                       Background="Transparent"
@@ -448,7 +447,7 @@
                         Command="{Binding PruneWorktrees}"
                         IsVisible="{Binding Worktrees, Converter={x:Static c:ListConverters.IsNotNullOrEmpty}}"
                         ToolTip.Tip="{DynamicResource Text.Repository.Worktrees.Prune}">
-                  <Path x:Name="icon" Width="12" Height="12" Data="{StaticResource Icons.Loading}"/>
+                  <Path Width="12" Height="12" Data="{StaticResource Icons.Loading}"/>
                 </Button>
                 <Button Grid.Column="3"
                         Classes="icon_button"
@@ -461,7 +460,7 @@
               </Grid>
             </ToggleButton>
             <DataGrid Grid.Row="9"
-                      x:Name="worktreeList"
+                      x:Name="WorktreeList"
                       Height="0"
                       Margin="8,0,4,0"
                       Background="Transparent"
@@ -534,7 +533,7 @@
         <Grid Grid.Row="1" RowDefinitions="Auto,32,*" Margin="8,0,4,8" IsVisible="{Binding IsSearching}" PropertyChanged="OnSearchCommitPanelPropertyChanged">
           <!-- Search Input Box -->
           <TextBox Grid.Row="0"
-                   x:Name="txtSearchCommitsBox"
+                   x:Name="TxtSearchCommitsBox"
                    Height="24"
                    BorderThickness="1"
                    BorderBrush="{DynamicResource Brush.Border2}"

src/Views/Repository.axaml.cs

@@ -66,7 +66,7 @@ namespace SourceGit.Views
         private void OnSearchCommitPanelPropertyChanged(object sender, AvaloniaPropertyChangedEventArgs e)
         {
             if (e.Property == IsVisibleProperty && sender is Grid { IsVisible: true })
-                txtSearchCommitsBox.Focus();
+                TxtSearchCommitsBox.Focus();
         }
 
         private void OnSearchKeyDown(object _, KeyEventArgs e)
@@ -98,22 +98,22 @@ namespace SourceGit.Views
 
         private void OnLocalBranchTreeSelectionChanged(object _1, RoutedEventArgs _2)
         {
-            remoteBranchTree.UnselectAll();
-            tagsList.SelectedItem = null;
+            RemoteBranchTree.UnselectAll();
+            TagsList.SelectedItem = null;
         }
 
         private void OnRemoteBranchTreeSelectionChanged(object _1, RoutedEventArgs _2)
         {
-            localBranchTree.UnselectAll();
-            tagsList.SelectedItem = null;
+            LocalBranchTree.UnselectAll();
+            TagsList.SelectedItem = null;
         }
 
         private void OnTagDataGridSelectionChanged(object sender, SelectionChangedEventArgs _)
         {
             if (sender is DataGrid { SelectedItem: Models.Tag tag })
             {
-                localBranchTree.UnselectAll();
-                remoteBranchTree.UnselectAll();
+                LocalBranchTree.UnselectAll();
+                RemoteBranchTree.UnselectAll();
 
                 if (DataContext is ViewModels.Repository repo)
                     repo.NavigateToCommit(tag.SHA);
@@ -122,17 +122,16 @@ namespace SourceGit.Views
 
         private void OnTagContextRequested(object sender, ContextRequestedEventArgs e)
         {
-            if (sender is DataGrid datagrid && datagrid.SelectedItem != null && DataContext is ViewModels.Repository repo)
+            if (sender is DataGrid { SelectedItem: Models.Tag tag } grid && DataContext is ViewModels.Repository repo)
             {
-                var tag = datagrid.SelectedItem as Models.Tag;
                 var menu = repo.CreateContextMenuForTag(tag);
-                datagrid.OpenContextMenu(menu);
+                grid.OpenContextMenu(menu);
             }
 
             e.Handled = true;
         }
 
-        private void OnToggleTagFilter(object sender, RoutedEventArgs e)
+        private void OnTagFilterIsCheckedChanged(object sender, RoutedEventArgs e)
         {
             if (sender is ToggleButton { DataContext: Models.Tag tag } toggle && DataContext is ViewModels.Repository repo)
             {
@@ -144,11 +143,10 @@ namespace SourceGit.Views
 
         private void OnSubmoduleContextRequested(object sender, ContextRequestedEventArgs e)
         {
-            if (sender is DataGrid datagrid && datagrid.SelectedItem != null && DataContext is ViewModels.Repository repo)
+            if (sender is DataGrid { SelectedItem: string submodule } grid && DataContext is ViewModels.Repository repo)
             {
-                var submodule = datagrid.SelectedItem as string;
                 var menu = repo.CreateContextMenuForSubmodule(submodule);
-                datagrid.OpenContextMenu(menu);
+                grid.OpenContextMenu(menu);
             }
 
             e.Handled = true;
@@ -156,9 +154,8 @@ namespace SourceGit.Views
 
         private void OnDoubleTappedSubmodule(object sender, TappedEventArgs e)
         {
-            if (sender is DataGrid { SelectedItem: not null } grid && DataContext is ViewModels.Repository repo)
+            if (sender is DataGrid { SelectedItem: string submodule } && DataContext is ViewModels.Repository repo)
             {
-                var submodule = grid.SelectedItem as string;
                 repo.OpenSubmodule(submodule);
             }
 
@@ -167,9 +164,8 @@ namespace SourceGit.Views
 
         private void OnWorktreeContextRequested(object sender, ContextRequestedEventArgs e)
         {
-            if (sender is DataGrid { SelectedItem: not null } grid && DataContext is ViewModels.Repository repo)
+            if (sender is DataGrid { SelectedItem: Models.Worktree worktree } grid && DataContext is ViewModels.Repository repo)
             {
-                var worktree = grid.SelectedItem as Models.Worktree;
                 var menu = repo.CreateContextMenuForWorktree(worktree);
                 grid.OpenContextMenu(menu);
             }
@@ -179,9 +175,8 @@ namespace SourceGit.Views
 
         private void OnDoubleTappedWorktree(object sender, TappedEventArgs e)
         {
-            if (sender is DataGrid { SelectedItem: not null } grid && DataContext is ViewModels.Repository repo)
+            if (sender is DataGrid { SelectedItem: Models.Worktree worktree } && DataContext is ViewModels.Repository repo)
             {
-                var worktree = grid.SelectedItem as Models.Worktree;
                 repo.OpenWorktree(worktree);
             }
 
@@ -205,13 +200,13 @@ namespace SourceGit.Views
             if (!IsLoaded)
                 return;
 
-            var leftHeight = leftSidebarGroups.Bounds.Height - 28.0 * 5;
-            var localBranchRows = vm.IsLocalBranchGroupExpanded ? localBranchTree.Rows.Count : 0;
-            var remoteBranchRows = vm.IsRemoteGroupExpanded ? remoteBranchTree.Rows.Count : 0;
+            var leftHeight = LeftSidebarGroups.Bounds.Height - 28.0 * 5;
+            var localBranchRows = vm.IsLocalBranchGroupExpanded ? LocalBranchTree.Rows.Count : 0;
+            var remoteBranchRows = vm.IsRemoteGroupExpanded ? RemoteBranchTree.Rows.Count : 0;
             var desiredBranches = (localBranchRows + remoteBranchRows) * 24.0;
-            var desiredTag = vm.IsTagGroupExpanded ? tagsList.RowHeight * vm.VisibleTags.Count : 0;
-            var desiredSubmodule = vm.IsSubmoduleGroupExpanded ? submoduleList.RowHeight * vm.Submodules.Count : 0;
-            var desiredWorktree = vm.IsWorktreeGroupExpanded ? worktreeList.RowHeight * vm.Worktrees.Count : 0;
+            var desiredTag = vm.IsTagGroupExpanded ? TagsList.RowHeight * vm.VisibleTags.Count : 0;
+            var desiredSubmodule = vm.IsSubmoduleGroupExpanded ? SubmoduleList.RowHeight * vm.Submodules.Count : 0;
+            var desiredWorktree = vm.IsWorktreeGroupExpanded ? WorktreeList.RowHeight * vm.Worktrees.Count : 0;
             var desiredOthers = desiredTag + desiredSubmodule + desiredWorktree;
             var hasOverflow = (desiredBranches + desiredOthers > leftHeight);
 
@@ -228,7 +223,7 @@ namespace SourceGit.Views
                 }
 
                 leftHeight -= height;
-                tagsList.Height = height;
+                TagsList.Height = height;
                 hasOverflow = (desiredBranches + desiredSubmodule + desiredWorktree) > leftHeight;
             }
 
@@ -245,7 +240,7 @@ namespace SourceGit.Views
                 }
 
                 leftHeight -= height;
-                submoduleList.Height = height;
+                SubmoduleList.Height = height;
                 hasOverflow = (desiredBranches + desiredWorktree) > leftHeight;
             }
 
@@ -262,7 +257,7 @@ namespace SourceGit.Views
                 }
 
                 leftHeight -= height;
-                worktreeList.Height = height;
+                WorktreeList.Height = height;
             }
 
             if (desiredBranches > leftHeight)
@@ -276,28 +271,28 @@ namespace SourceGit.Views
                     {
                         if (local < half)
                         {
-                            localBranchTree.Height = local;
-                            remoteBranchTree.Height = leftHeight - local;
+                            LocalBranchTree.Height = local;
+                            RemoteBranchTree.Height = leftHeight - local;
                         }
                         else if (remote < half)
                         {
-                            remoteBranchTree.Height = remote;
-                            localBranchTree.Height = leftHeight - remote;
+                            RemoteBranchTree.Height = remote;
+                            LocalBranchTree.Height = leftHeight - remote;
                         }
                         else
                         {
-                            localBranchTree.Height = half;
-                            remoteBranchTree.Height = half;
+                            LocalBranchTree.Height = half;
+                            RemoteBranchTree.Height = half;
                         }
                     }
                     else
                     {
-                        localBranchTree.Height = leftHeight;
+                        LocalBranchTree.Height = leftHeight;
                     }
                 }
                 else if (vm.IsRemoteGroupExpanded)
                 {
-                    remoteBranchTree.Height = leftHeight;
+                    RemoteBranchTree.Height = leftHeight;
                 }
             }
             else
@@ -305,17 +300,15 @@ namespace SourceGit.Views
                 if (vm.IsLocalBranchGroupExpanded)
                 {
                     var height = localBranchRows * 24;
-                    localBranchTree.Height = height;
+                    LocalBranchTree.Height = height;
                 }
 
                 if (vm.IsRemoteGroupExpanded)
                 {
                     var height = remoteBranchRows * 24;
-                    remoteBranchTree.Height = height;
+                    RemoteBranchTree.Height = height;
                 }
             }
-
-            leftSidebarGroups.InvalidateMeasure();
         }
     }
 }

src/Views/RepositoryConfigure.axaml

@@ -2,10 +2,8 @@
              xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
              xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
              xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
-             xmlns:m="using:SourceGit.Models"
              xmlns:vm="using:SourceGit.ViewModels"
              xmlns:v="using:SourceGit.Views"
-             xmlns:c="using:SourceGit.Converters"
              mc:Ignorable="d" d:DesignWidth="800" d:DesignHeight="450"
              x:Class="SourceGit.Views.RepositoryConfigure"
              x:DataType="vm:RepositoryConfigure">
@@ -15,11 +13,11 @@
                Text="{DynamicResource Text.Configure}"/>
 
     <Grid Margin="0,16,0,0" RowDefinitions="32,32,32,32,32,32" ColumnDefinitions="150,*">
-      <TextBlock Grid.Column="0"
+      <TextBlock Grid.Row="0" Grid.Column="0"
                  HorizontalAlignment="Right" VerticalAlignment="Center"
                  Margin="0,0,8,0"
                  Text="{DynamicResource Text.Configure.User}"/>
-      <TextBox Grid.Column="1"
+      <TextBox Grid.Row="0" Grid.Column="1"
                Height="28"
                CornerRadius="3"
                Watermark="{DynamicResource Text.Configure.User.Placeholder}"

src/Views/Revert.axaml

@@ -2,7 +2,6 @@
              xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
              xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
              xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
-             xmlns:m="using:SourceGit.Models"
              xmlns:vm="using:SourceGit.ViewModels"
              xmlns:c="using:SourceGit.Converters"
              mc:Ignorable="d" d:DesignWidth="800" d:DesignHeight="450"
@@ -13,12 +12,12 @@
                Classes="bold"
                Text="{DynamicResource Text.Revert}"/>
     <Grid Margin="0,16,0,0" RowDefinitions="32,32" ColumnDefinitions="130,*">
-      <TextBlock Grid.Column="0"
+      <TextBlock Grid.Row="0" Grid.Column="0"
                  HorizontalAlignment="Right" VerticalAlignment="Center"
                  Margin="0,0,8,0"
                  Text="{DynamicResource Text.Revert.Commit}"/>
 
-      <Grid Grid.Column="1" ColumnDefinitions="Auto,Auto,*">
+      <Grid Grid.Row="0" Grid.Column="1" ColumnDefinitions="Auto,Auto,*">
         <Path Grid.Column="0" Width="14" Height="14" Margin="0,8,0,0" Data="{StaticResource Icons.Commit}"/>
         <TextBlock Grid.Column="1" Classes="monospace" VerticalAlignment="Center" Text="{Binding Target.SHA, Converter={x:Static c:StringConverters.ToShortSHA}}" Foreground="DarkOrange" Margin="8,0,0,0"/>
         <TextBlock Grid.Column="2" VerticalAlignment="Center" Text="{Binding Target.Subject}" Margin="4,0,0,0" TextTrimming="CharacterEllipsis"/>

src/Views/RevisionCompare.axaml

@@ -34,7 +34,7 @@
       <Path Grid.Column="1" Width="16" Height="16" Fill="{DynamicResource Brush.FG2}" Data="{DynamicResource Icons.Down}" RenderTransformOrigin="50%,50%" RenderTransform="rotate(270deg)"/>
 
       <Border Grid.Column="2" BorderBrush="{DynamicResource Brush.Border2}" BorderThickness="1" Background="{DynamicResource Brush.Contents}" CornerRadius="4" Padding="4">
-        <ContentControl Grid.Column="2" Content="{Binding EndPoint}">
+        <ContentControl Content="{Binding EndPoint}">
           <ContentControl.DataTemplates>
             <DataTemplate DataType="m:Commit">
               <Grid RowDefinitions="Auto,*">

src/Views/RevisionFileTreeView.axaml

@@ -29,7 +29,7 @@
     </ListBox.Styles>
 
     <ListBox.ItemTemplate>
-      <DataTemplate DataType="v:RevisionFileTreeNode">
+      <DataTemplate DataType="vm:RevisionFileTreeNode">
         <Grid ColumnDefinitions="16,Auto,Auto,*"
               Margin="{Binding Depth, Converter={x:Static c:IntConverters.ToTreeMargin}}"
               Background="Transparent"

src/Views/RevisionFileTreeView.axaml.cs

@@ -1,6 +1,5 @@
 using System;
 using System.Collections.Generic;
-using System.IO;
 
 using Avalonia;
 using Avalonia.Collections;
@@ -11,35 +10,8 @@ using Avalonia.Layout;
 using Avalonia.Media;
 using Avalonia.VisualTree;
 
-using CommunityToolkit.Mvvm.ComponentModel;
-
 namespace SourceGit.Views
 {
-    public class RevisionFileTreeNode : ObservableObject
-    {
-        public Models.Object Backend { get; set; } = null;
-        public int Depth { get; set; } = 0;
-        public List<RevisionFileTreeNode> Children { get; set; } = new List<RevisionFileTreeNode>();
-
-        public string Name
-        {
-            get => Backend == null ? string.Empty : Path.GetFileName(Backend.Path);
-        }
-
-        public bool IsFolder
-        {
-            get => Backend != null && Backend.Type == Models.ObjectType.Tree;
-        }
-
-        public bool IsExpanded
-        {
-            get => _isExpanded;
-            set => SetProperty(ref _isExpanded, value);
-        }
-
-        private bool _isExpanded = false;
-    }
-
     public class RevisionFileTreeNodeToggleButton : ToggleButton
     {
         protected override Type StyleKeyOverride => typeof(ToggleButton);
@@ -47,10 +19,10 @@ namespace SourceGit.Views
         protected override void OnPointerPressed(PointerPressedEventArgs e)
         {
             if (e.GetCurrentPoint(this).Properties.IsLeftButtonPressed &&
-                DataContext is RevisionFileTreeNode { IsFolder: true } node)
+                DataContext is ViewModels.RevisionFileTreeNode { IsFolder: true } node)
             {
                 var tree = this.FindAncestorOfType<RevisionFileTreeView>();
-                tree.ToggleNodeIsExpanded(node);
+                tree?.ToggleNodeIsExpanded(node);
             }
 
             e.Handled = true;
@@ -59,10 +31,10 @@ namespace SourceGit.Views
 
     public class RevisionTreeNodeIcon : UserControl
     {
-        public static readonly StyledProperty<RevisionFileTreeNode> NodeProperty =
-            AvaloniaProperty.Register<RevisionTreeNodeIcon, RevisionFileTreeNode>(nameof(Node));
+        public static readonly StyledProperty<ViewModels.RevisionFileTreeNode> NodeProperty =
+            AvaloniaProperty.Register<RevisionTreeNodeIcon, ViewModels.RevisionFileTreeNode>(nameof(Node));
 
-        public RevisionFileTreeNode Node
+        public ViewModels.RevisionFileTreeNode Node
         {
             get => GetValue(NodeProperty);
             set => SetValue(NodeProperty, value);
@@ -86,31 +58,28 @@ namespace SourceGit.Views
         private void UpdateContent()
         {
             var node = Node;
-            if (node == null || node.Backend == null)
+            if (node?.Backend == null)
             {
                 Content = null;
                 return;
             }
 
             var obj = node.Backend;
-            if (obj.Type == Models.ObjectType.Blob)
+            switch (obj.Type)
             {
-                CreateContent(14, new Thickness(0, 0, 0, 0), "Icons.File");
-            }
-            else if (obj.Type == Models.ObjectType.Commit)
-            {
-                CreateContent(14, new Thickness(0, 0, 0, 0), "Icons.Submodule");
-            }
-            else
-            {
-                if (node.IsExpanded)
-                    CreateContent(14, new Thickness(0, 2, 0, 0), "Icons.Folder.Open", Brushes.Goldenrod);
-                else
-                    CreateContent(14, new Thickness(0, 2, 0, 0), "Icons.Folder.Fill", Brushes.Goldenrod);
+                case Models.ObjectType.Blob:
+                    CreateContent("Icons.File");
+                    break;
+                case Models.ObjectType.Commit:
+                    CreateContent("Icons.Submodule");
+                    break;
+                default:
+                    CreateContent(node.IsExpanded ? "Icons.Folder.Open" : "Icons.Folder.Fill", Brushes.Goldenrod);
+                    break;
             }
         }
 
-        private void CreateContent(double size, Thickness margin, string iconKey, IBrush fill = null)
+        private void CreateContent(string iconKey, IBrush fill = null)
         {
             var geo = this.FindResource(iconKey) as StreamGeometry;
             if (geo == null)
@@ -118,11 +87,10 @@ namespace SourceGit.Views
 
             var icon = new Avalonia.Controls.Shapes.Path()
             {
-                Width = size,
-                Height = size,
+                Width = 14,
+                Height = 14,
                 HorizontalAlignment = HorizontalAlignment.Left,
                 VerticalAlignment = VerticalAlignment.Center,
-                Margin = margin,
                 Data = geo,
             };
 
@@ -136,7 +104,7 @@ namespace SourceGit.Views
     public partial class RevisionFileTreeView : UserControl
     {
         public static readonly StyledProperty<string> RevisionProperty =
-            AvaloniaProperty.Register<RevisionFileTreeView, string>(nameof(Revision), null);
+            AvaloniaProperty.Register<RevisionFileTreeView, string>(nameof(Revision));
 
         public string Revision
         {
@@ -144,7 +112,7 @@ namespace SourceGit.Views
             set => SetValue(RevisionProperty, value);
         }
 
-        public AvaloniaList<RevisionFileTreeNode> Rows
+        public AvaloniaList<ViewModels.RevisionFileTreeNode> Rows
         {
             get => _rows;
         }
@@ -154,7 +122,7 @@ namespace SourceGit.Views
             InitializeComponent();
         }
 
-        public void ToggleNodeIsExpanded(RevisionFileTreeNode node)
+        public void ToggleNodeIsExpanded(ViewModels.RevisionFileTreeNode node)
         {
             _disableSelectionChangingEvent = true;
             node.IsExpanded = !node.IsExpanded;
@@ -169,7 +137,7 @@ namespace SourceGit.Views
                 var subtree = GetChildrenOfTreeNode(node);
                 if (subtree != null && subtree.Count > 0)
                 {
-                    var subrows = new List<RevisionFileTreeNode>();
+                    var subrows = new List<ViewModels.RevisionFileTreeNode>();
                     MakeRows(subrows, subtree, depth + 1);
                     _rows.InsertRange(idx + 1, subrows);
                 }
@@ -215,16 +183,16 @@ namespace SourceGit.Views
                 }
 
                 foreach (var obj in objects)
-                    _tree.Add(new RevisionFileTreeNode { Backend = obj });
+                    _tree.Add(new ViewModels.RevisionFileTreeNode { Backend = obj });
 
                 _tree.Sort((l, r) =>
                 {
                     if (l.IsFolder == r.IsFolder)
-                        return l.Name.CompareTo(r.Name);
+                        return string.Compare(l.Name, r.Name, StringComparison.Ordinal);
                     return l.IsFolder ? -1 : 1;
                 });
 
-                var topTree = new List<RevisionFileTreeNode>();
+                var topTree = new List<ViewModels.RevisionFileTreeNode>();
                 MakeRows(topTree, _tree, 0);
                 _rows.AddRange(topTree);
                 GC.Collect();
@@ -233,7 +201,8 @@ namespace SourceGit.Views
 
         private void OnTreeNodeContextRequested(object sender, ContextRequestedEventArgs e)
         {
-            if (DataContext is ViewModels.CommitDetail vm && sender is Grid { DataContext: RevisionFileTreeNode { Backend: Models.Object obj } } grid)
+            if (DataContext is ViewModels.CommitDetail vm &&
+                sender is Grid { DataContext: ViewModels.RevisionFileTreeNode { Backend: { } obj } } grid)
             {
                 if (obj.Type != Models.ObjectType.Tree)
                 {
@@ -247,7 +216,7 @@ namespace SourceGit.Views
 
         private void OnTreeNodeDoubleTapped(object sender, TappedEventArgs e)
         {
-            if (sender is Grid { DataContext: RevisionFileTreeNode { IsFolder: true } node })
+            if (sender is Grid { DataContext: ViewModels.RevisionFileTreeNode { IsFolder: true } node })
             {
                 var posX = e.GetPosition(this).X;
                 if (posX < node.Depth * 16 + 16)
@@ -257,22 +226,21 @@ namespace SourceGit.Views
             }
         }
 
-        private void OnRowsSelectionChanged(object sender, SelectionChangedEventArgs e)
+        private void OnRowsSelectionChanged(object sender, SelectionChangedEventArgs _)
         {
             if (_disableSelectionChangingEvent)
                 return;
 
-            if (sender is ListBox list && DataContext is ViewModels.CommitDetail vm)
+            if (sender is ListBox { SelectedItem: ViewModels.RevisionFileTreeNode node } && DataContext is ViewModels.CommitDetail vm)
             {
-                var node = list.SelectedItem as RevisionFileTreeNode;
-                if (node != null && !node.IsFolder)
+                if (!node.IsFolder)
                     vm.ViewRevisionFile(node.Backend);
                 else
                     vm.ViewRevisionFile(null);
             }
         }
 
-        private List<RevisionFileTreeNode> GetChildrenOfTreeNode(RevisionFileTreeNode node)
+        private List<ViewModels.RevisionFileTreeNode> GetChildrenOfTreeNode(ViewModels.RevisionFileTreeNode node)
         {
             if (!node.IsFolder)
                 return null;
@@ -289,19 +257,19 @@ namespace SourceGit.Views
                 return null;
 
             foreach (var obj in objects)
-                node.Children.Add(new RevisionFileTreeNode() { Backend = obj });
+                node.Children.Add(new ViewModels.RevisionFileTreeNode() { Backend = obj });
 
             node.Children.Sort((l, r) =>
             {
                 if (l.IsFolder == r.IsFolder)
-                    return l.Name.CompareTo(r.Name);
+                    return string.Compare(l.Name, r.Name, StringComparison.Ordinal);
                 return l.IsFolder ? -1 : 1;
             });
 
             return node.Children;
         }
 
-        private void MakeRows(List<RevisionFileTreeNode> rows, List<RevisionFileTreeNode> nodes, int depth)
+        private void MakeRows(List<ViewModels.RevisionFileTreeNode> rows, List<ViewModels.RevisionFileTreeNode> nodes, int depth)
         {
             foreach (var node in nodes)
             {
@@ -315,8 +283,8 @@ namespace SourceGit.Views
             }
         }
 
-        private List<RevisionFileTreeNode> _tree = new List<RevisionFileTreeNode>();
-        private AvaloniaList<RevisionFileTreeNode> _rows = new AvaloniaList<RevisionFileTreeNode>();
+        private List<ViewModels.RevisionFileTreeNode> _tree = new List<ViewModels.RevisionFileTreeNode>();
+        private AvaloniaList<ViewModels.RevisionFileTreeNode> _rows = new AvaloniaList<ViewModels.RevisionFileTreeNode>();
         private bool _disableSelectionChangingEvent = false;
     }
 }

src/Views/RevisionFiles.axaml.cs

@@ -49,8 +49,7 @@ namespace SourceGit.Views
         {
             base.OnDataContextChanged(e);
 
-            var source = DataContext as Models.RevisionTextFile;
-            if (source != null)
+            if (DataContext is Models.RevisionTextFile source)
                 Text = source.Content;
             else
                 Text = string.Empty;
@@ -62,21 +61,24 @@ namespace SourceGit.Views
             if (string.IsNullOrEmpty(selected))
                 return;
 
-            var icon = new Avalonia.Controls.Shapes.Path();
-            icon.Width = 10;
-            icon.Height = 10;
-            icon.Stretch = Stretch.Uniform;
-            icon.Data = App.Current?.FindResource("Icons.Copy") as StreamGeometry;
-
-            var copy = new MenuItem();
-            copy.Header = App.Text("Copy");
-            copy.Icon = icon;
-            copy.Click += (o, ev) =>
+            var copy = new MenuItem() { Header = App.Text("Copy") };
+            copy.Click += (_, ev) =>
             {
                 App.CopyText(selected);
                 ev.Handled = true;
             };
 
+            if (this.FindResource("Icons.Copy") is Geometry geo)
+            {
+                copy.Icon = new Avalonia.Controls.Shapes.Path()
+                {
+                    Width = 10,
+                    Height = 10,
+                    Stretch = Stretch.Uniform,
+                    Data = geo,
+                };
+            }
+
             var menu = new ContextMenu();
             menu.Items.Add(copy);
 

src/Views/SelfUpdate.axaml.cs

@@ -11,17 +11,17 @@ namespace SourceGit.Views
             InitializeComponent();
         }
 
-        private void BeginMoveWindow(object sender, PointerPressedEventArgs e)
+        private void BeginMoveWindow(object _, PointerPressedEventArgs e)
         {
             BeginMoveDrag(e);
         }
 
-        private void CloseWindow(object sender, RoutedEventArgs e)
+        private void CloseWindow(object _1, RoutedEventArgs _2)
         {
             Close();
         }
 
-        private void GotoDownload(object sender, RoutedEventArgs e)
+        private void GotoDownload(object _, RoutedEventArgs e)
         {
             Native.OS.OpenBrowser("https://github.com/sourcegit-scm/sourcegit/releases/latest");
             e.Handled = true;
@@ -29,9 +29,9 @@ namespace SourceGit.Views
 
         private void IgnoreThisVersion(object sender, RoutedEventArgs e)
         {
-            var button = sender as Button;
-            var ver = button.DataContext as Models.Version;
+            if (sender is Button { DataContext: Models.Version ver })
                 ViewModels.Preference.Instance.IgnoreUpdateTag = ver.TagName;
+
             Close();
             e.Handled = true;
         }

src/Views/StandaloneCommitMessageEditor.axaml

@@ -2,10 +2,9 @@
                     xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
                     xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
                     xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
-                    xmlns:vm="using:SourceGit.ViewModels"
                     xmlns:v="using:SourceGit.Views"
                     mc:Ignorable="d" d:DesignWidth="800" d:DesignHeight="450"
-                    x:Class="SourceGit.Views.CodeEditor"
+                    x:Class="SourceGit.Views.StandaloneCommitMessageEditor"
                     Icon="/App.ico"
                     Title="{DynamicResource Text.CodeEditor}"
                     Width="800"

src/Views/StandaloneCommitMessageEditor.axaml.cs

@@ -1,20 +1,21 @@
 using System;
 using System.IO;
-using System.Text;
+
 using Avalonia.Input;
 using Avalonia.Interactivity;
 
 namespace SourceGit.Views
 {
-    public partial class CodeEditor : ChromelessWindow
+    public partial class StandaloneCommitMessageEditor : ChromelessWindow
     {
-        public CodeEditor()
+        public StandaloneCommitMessageEditor()
         {
+            _file = string.Empty;
             DataContext = this;
             InitializeComponent();
         }
 
-        public CodeEditor(string file)
+        public StandaloneCommitMessageEditor(string file)
         {
             _file = file;
             DataContext = this;
@@ -33,22 +34,22 @@ namespace SourceGit.Views
             }
         }
 
-        private void BeginMoveWindow(object sender, PointerPressedEventArgs e)
+        private void BeginMoveWindow(object _, PointerPressedEventArgs e)
         {
             BeginMoveDrag(e);
         }
 
-        private void CloseWindow(object sender, RoutedEventArgs e)
+        private void CloseWindow(object _1, RoutedEventArgs _2)
         {
             Environment.Exit(-1);
         }
 
-        private void SaveAndClose(object sender, RoutedEventArgs e)
+        private void SaveAndClose(object _1, RoutedEventArgs _2)
         {
             File.WriteAllText(_file, Editor.Text);
             Environment.Exit(0);
         }
 
-        private string _file = string.Empty;
+        private readonly string _file;
     }
 }

src/Views/StashChanges.axaml

@@ -2,10 +2,8 @@
              xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
              xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
              xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
-             xmlns:m="using:SourceGit.Models"
              xmlns:vm="using:SourceGit.ViewModels"
              xmlns:v="using:SourceGit.Views"
-             xmlns:c="using:SourceGit.Converters"
              mc:Ignorable="d" d:DesignWidth="500" d:DesignHeight="450"
              x:Class="SourceGit.Views.StashChanges"
              x:DataType="vm:StashChanges">
@@ -14,8 +12,11 @@
                Classes="bold"
                Text="{DynamicResource Text.Stash.Title}"/>
     <Grid Margin="8,16,0,0" RowDefinitions="32,Auto" ColumnDefinitions="120,*">
-      <TextBlock Grid.Column="0" HorizontalAlignment="Right" Margin="8,0" Text="{DynamicResource Text.Stash.Message}"/>
-      <TextBox Grid.Column="1" 
+      <TextBlock Grid.Row="0" Grid.Column="0" 
+                 HorizontalAlignment="Right" 
+                 Margin="8,0" 
+                 Text="{DynamicResource Text.Stash.Message}"/>
+      <TextBox Grid.Row="0" Grid.Column="1" 
                Height="26" 
                CornerRadius="3" 
                Text="{Binding Message, Mode=TwoWay}"

src/Views/StashesPage.axaml

@@ -35,8 +35,7 @@
 
       <!-- Search Bar -->
       <Border Grid.Row="1" BorderThickness="0,1" BorderBrush="{DynamicResource Brush.Border0}">
-        <TextBox Grid.Row="1"
-                 Height="24"
+        <TextBox Height="24"
                  Margin="4,0"
                  BorderThickness="1"
                  CornerRadius="12"

src/Views/Statistics.axaml.cs

@@ -40,7 +40,7 @@ namespace SourceGit.Views
         }
 
         public static readonly StyledProperty<List<Models.StatisticsSample>> SamplesProperty =
-            AvaloniaProperty.Register<Chart, List<Models.StatisticsSample>>(nameof(Samples), null);
+            AvaloniaProperty.Register<Chart, List<Models.StatisticsSample>>(nameof(Samples));
 
         public List<Models.StatisticsSample> Samples
         {
@@ -50,7 +50,7 @@ namespace SourceGit.Views
 
         static Chart()
         {
-            SamplesProperty.Changed.AddClassHandler<Chart>((c, e) =>
+            SamplesProperty.Changed.AddClassHandler<Chart>((c, _) =>
             {
                 c._hitBoxes.Clear();
                 c._lastHitIdx = -1;
@@ -87,7 +87,7 @@ namespace SourceGit.Views
                 maxV = (int)Math.Ceiling(maxV / 500.0) * 500;
 
             var typeface = new Typeface("fonts:SourceGit#JetBrains Mono");
-            var pen = new Pen(LineBrush, 1);
+            var pen = new Pen(LineBrush);
             var width = Bounds.Width;
             var height = Bounds.Height;
 
@@ -228,12 +228,12 @@ namespace SourceGit.Views
             InitializeComponent();
         }
 
-        private void BeginMoveWindow(object sender, PointerPressedEventArgs e)
+        private void BeginMoveWindow(object _, PointerPressedEventArgs e)
         {
             BeginMoveDrag(e);
         }
 
-        private void CloseWindow(object sender, RoutedEventArgs e)
+        private void CloseWindow(object _1, RoutedEventArgs _2)
         {
             Close();
         }

src/Views/TextDiffView.axaml.cs

@@ -22,10 +22,10 @@ using AvaloniaEdit.Utils;
 
 namespace SourceGit.Views
 {
-    public class IThemedTextDiffPresenter : TextEditor
+    public class ThemedTextDiffPresenter : TextEditor
     {
         public static readonly StyledProperty<string> FileNameProperty =
-            AvaloniaProperty.Register<IThemedTextDiffPresenter, string>(nameof(FileName), string.Empty);
+            AvaloniaProperty.Register<ThemedTextDiffPresenter, string>(nameof(FileName), string.Empty);
 
         public string FileName
         {
@@ -34,7 +34,7 @@ namespace SourceGit.Views
         }
 
         public static readonly StyledProperty<IBrush> LineBrushProperty =
-            AvaloniaProperty.Register<IThemedTextDiffPresenter, IBrush>(nameof(LineBrush), new SolidColorBrush(Colors.DarkGray));
+            AvaloniaProperty.Register<ThemedTextDiffPresenter, IBrush>(nameof(LineBrush), new SolidColorBrush(Colors.DarkGray));
 
         public IBrush LineBrush
         {
@@ -43,7 +43,7 @@ namespace SourceGit.Views
         }
 
         public static readonly StyledProperty<IBrush> EmptyContentBackgroundProperty =
-            AvaloniaProperty.Register<IThemedTextDiffPresenter, IBrush>(nameof(EmptyContentBackground), new SolidColorBrush(Color.FromArgb(60, 0, 0, 0)));
+            AvaloniaProperty.Register<ThemedTextDiffPresenter, IBrush>(nameof(EmptyContentBackground), new SolidColorBrush(Color.FromArgb(60, 0, 0, 0)));
 
         public IBrush EmptyContentBackground
         {
@@ -52,7 +52,7 @@ namespace SourceGit.Views
         }
 
         public static readonly StyledProperty<IBrush> AddedContentBackgroundProperty =
-            AvaloniaProperty.Register<IThemedTextDiffPresenter, IBrush>(nameof(AddedContentBackground), new SolidColorBrush(Color.FromArgb(60, 0, 255, 0)));
+            AvaloniaProperty.Register<ThemedTextDiffPresenter, IBrush>(nameof(AddedContentBackground), new SolidColorBrush(Color.FromArgb(60, 0, 255, 0)));
 
         public IBrush AddedContentBackground
         {
@@ -61,7 +61,7 @@ namespace SourceGit.Views
         }
 
         public static readonly StyledProperty<IBrush> DeletedContentBackgroundProperty =
-            AvaloniaProperty.Register<IThemedTextDiffPresenter, IBrush>(nameof(DeletedContentBackground), new SolidColorBrush(Color.FromArgb(60, 255, 0, 0)));
+            AvaloniaProperty.Register<ThemedTextDiffPresenter, IBrush>(nameof(DeletedContentBackground), new SolidColorBrush(Color.FromArgb(60, 255, 0, 0)));
 
         public IBrush DeletedContentBackground
         {
@@ -70,7 +70,7 @@ namespace SourceGit.Views
         }
 
         public static readonly StyledProperty<IBrush> AddedHighlightBrushProperty =
-            AvaloniaProperty.Register<IThemedTextDiffPresenter, IBrush>(nameof(AddedHighlightBrush), new SolidColorBrush(Color.FromArgb(90, 0, 255, 0)));
+            AvaloniaProperty.Register<ThemedTextDiffPresenter, IBrush>(nameof(AddedHighlightBrush), new SolidColorBrush(Color.FromArgb(90, 0, 255, 0)));
 
         public IBrush AddedHighlightBrush
         {
@@ -79,7 +79,7 @@ namespace SourceGit.Views
         }
 
         public static readonly StyledProperty<IBrush> DeletedHighlightBrushProperty =
-            AvaloniaProperty.Register<IThemedTextDiffPresenter, IBrush>(nameof(DeletedHighlightBrush), new SolidColorBrush(Color.FromArgb(80, 255, 0, 0)));
+            AvaloniaProperty.Register<ThemedTextDiffPresenter, IBrush>(nameof(DeletedHighlightBrush), new SolidColorBrush(Color.FromArgb(80, 255, 0, 0)));
 
         public IBrush DeletedHighlightBrush
         {
@@ -88,7 +88,7 @@ namespace SourceGit.Views
         }
 
         public static readonly StyledProperty<IBrush> IndicatorForegroundProperty =
-            AvaloniaProperty.Register<IThemedTextDiffPresenter, IBrush>(nameof(IndicatorForeground), Brushes.Gray);
+            AvaloniaProperty.Register<ThemedTextDiffPresenter, IBrush>(nameof(IndicatorForeground), Brushes.Gray);
 
         public IBrush IndicatorForeground
         {
@@ -97,7 +97,7 @@ namespace SourceGit.Views
         }
 
         public static readonly StyledProperty<bool> UseSyntaxHighlightingProperty =
-            AvaloniaProperty.Register<IThemedTextDiffPresenter, bool>(nameof(UseSyntaxHighlighting), false);
+            AvaloniaProperty.Register<ThemedTextDiffPresenter, bool>(nameof(UseSyntaxHighlighting));
 
         public bool UseSyntaxHighlighting
         {
@@ -106,7 +106,7 @@ namespace SourceGit.Views
         }
 
         public static readonly StyledProperty<bool> ShowHiddenSymbolsProperty =
-            AvaloniaProperty.Register<IThemedTextDiffPresenter, bool>(nameof(ShowHiddenSymbols), false);
+            AvaloniaProperty.Register<ThemedTextDiffPresenter, bool>(nameof(ShowHiddenSymbols));
 
         public bool ShowHiddenSymbols
         {
@@ -116,7 +116,7 @@ namespace SourceGit.Views
 
         protected override Type StyleKeyOverride => typeof(TextEditor);
 
-        public IThemedTextDiffPresenter(TextArea area, TextDocument doc) : base(area, doc)
+        protected ThemedTextDiffPresenter(TextArea area, TextDocument doc) : base(area, doc)
         {
             IsReadOnly = true;
             ShowLineNumbers = false;
@@ -168,7 +168,7 @@ namespace SourceGit.Views
             }
         }
 
-        protected void UpdateTextMate()
+        private void UpdateTextMate()
         {
             if (UseSyntaxHighlighting)
             {
@@ -197,9 +197,9 @@ namespace SourceGit.Views
         protected IVisualLineTransformer _lineStyleTransformer = null;
     }
 
-    public class CombinedTextDiffPresenter : IThemedTextDiffPresenter
+    public class CombinedTextDiffPresenter : ThemedTextDiffPresenter
     {
-        public class LineNumberMargin : AbstractMargin
+        private class LineNumberMargin : AbstractMargin
         {
             public LineNumberMargin(CombinedTextDiffPresenter editor, bool isOldLine)
             {
@@ -247,8 +247,7 @@ namespace SourceGit.Views
                 {
                     return new Size(32, 0);
                 }
-                else
-                {
+
                 var typeface = TextView.CreateTypeface();
                 var test = new FormattedText(
                     $"{_editor.DiffData.MaxLineNumber}",
@@ -259,7 +258,6 @@ namespace SourceGit.Views
                     Brushes.White);
                 return new Size(test.Width, 0);
             }
-            }
 
             protected override void OnDataContextChanged(EventArgs e)
             {
@@ -271,7 +269,7 @@ namespace SourceGit.Views
             private readonly bool _isOldLine;
         }
 
-        public class VerticalSeperatorMargin : AbstractMargin
+        private class VerticalSeperatorMargin : AbstractMargin
         {
             public VerticalSeperatorMargin(CombinedTextDiffPresenter editor)
             {
@@ -280,7 +278,7 @@ namespace SourceGit.Views
 
             public override void Render(DrawingContext context)
             {
-                var pen = new Pen(_editor.LineBrush, 1);
+                var pen = new Pen(_editor.LineBrush);
                 context.DrawLine(pen, new Point(0, 0), new Point(0, Bounds.Height));
             }
 
@@ -292,7 +290,7 @@ namespace SourceGit.Views
             private readonly CombinedTextDiffPresenter _editor = null;
         }
 
-        public class LineBackgroundRenderer : IBackgroundRenderer
+        private class LineBackgroundRenderer : IBackgroundRenderer
         {
             public KnownLayer Layer => KnownLayer.Background;
 
@@ -344,7 +342,7 @@ namespace SourceGit.Views
             private readonly CombinedTextDiffPresenter _editor = null;
         }
 
-        public class LineStyleTransformer : DocumentColorizingTransformer
+        private class LineStyleTransformer : DocumentColorizingTransformer
         {
             public LineStyleTransformer(CombinedTextDiffPresenter editor)
             {
@@ -405,7 +403,7 @@ namespace SourceGit.Views
             base.OnApplyTemplate(e);
 
             var scroller = (ScrollViewer)e.NameScope.Find("PART_ScrollViewer");
-            scroller.Bind(ScrollViewer.OffsetProperty, new Binding("SyncScrollOffset", BindingMode.TwoWay));
+            scroller?.Bind(ScrollViewer.OffsetProperty, new Binding("SyncScrollOffset", BindingMode.TwoWay));
         }
 
         protected override void OnLoaded(RoutedEventArgs e)
@@ -466,7 +464,7 @@ namespace SourceGit.Views
             var copy = new MenuItem();
             copy.Header = App.Text("Copy");
             copy.Icon = App.CreateMenuIcon("Icons.Copy");
-            copy.Click += (o, ev) =>
+            copy.Click += (_, ev) =>
             {
                 App.CopyText(SelectedText);
                 ev.Handled = true;
@@ -479,9 +477,9 @@ namespace SourceGit.Views
         }
     }
 
-    public class SingleSideTextDiffPresenter : IThemedTextDiffPresenter
+    public class SingleSideTextDiffPresenter : ThemedTextDiffPresenter
     {
-        public class LineNumberMargin : AbstractMargin
+        private class LineNumberMargin : AbstractMargin
         {
             public LineNumberMargin(SingleSideTextDiffPresenter editor)
             {
@@ -529,8 +527,7 @@ namespace SourceGit.Views
                 {
                     return new Size(32, 0);
                 }
-                else
-                {
+
                 var typeface = TextView.CreateTypeface();
                 var test = new FormattedText(
                     $"{_editor.DiffData.MaxLineNumber}",
@@ -541,7 +538,6 @@ namespace SourceGit.Views
                     Brushes.White);
                 return new Size(test.Width, 0);
             }
-            }
 
             protected override void OnDataContextChanged(EventArgs e)
             {
@@ -552,7 +548,7 @@ namespace SourceGit.Views
             private readonly SingleSideTextDiffPresenter _editor;
         }
 
-        public class VerticalSeperatorMargin : AbstractMargin
+        private class VerticalSeperatorMargin : AbstractMargin
         {
             public VerticalSeperatorMargin(SingleSideTextDiffPresenter editor)
             {
@@ -561,7 +557,7 @@ namespace SourceGit.Views
 
             public override void Render(DrawingContext context)
             {
-                var pen = new Pen(_editor.LineBrush, 1);
+                var pen = new Pen(_editor.LineBrush);
                 context.DrawLine(pen, new Point(0, 0), new Point(0, Bounds.Height));
             }
 
@@ -573,7 +569,7 @@ namespace SourceGit.Views
             private readonly SingleSideTextDiffPresenter _editor = null;
         }
 
-        public class LineBackgroundRenderer : IBackgroundRenderer
+        private class LineBackgroundRenderer : IBackgroundRenderer
         {
             public KnownLayer Layer => KnownLayer.Background;
 
@@ -626,7 +622,7 @@ namespace SourceGit.Views
             private readonly SingleSideTextDiffPresenter _editor = null;
         }
 
-        public class LineStyleTransformer : DocumentColorizingTransformer
+        private class LineStyleTransformer : DocumentColorizingTransformer
         {
             public LineStyleTransformer(SingleSideTextDiffPresenter editor)
             {
@@ -776,7 +772,7 @@ namespace SourceGit.Views
             var copy = new MenuItem();
             copy.Header = App.Text("Copy");
             copy.Icon = App.CreateMenuIcon("Icons.Copy");
-            copy.Click += (o, ev) =>
+            copy.Click += (_, ev) =>
             {
                 App.CopyText(SelectedText);
                 ev.Handled = true;
@@ -794,7 +790,7 @@ namespace SourceGit.Views
     public partial class TextDiffView : UserControl
     {
         public static readonly StyledProperty<bool> UseSideBySideDiffProperty =
-            AvaloniaProperty.Register<TextDiffView, bool>(nameof(UseSideBySideDiff), false);
+            AvaloniaProperty.Register<TextDiffView, bool>(nameof(UseSideBySideDiff));
 
         public bool UseSideBySideDiff
         {
@@ -804,7 +800,7 @@ namespace SourceGit.Views
 
         static TextDiffView()
         {
-            UseSideBySideDiffProperty.Changed.AddClassHandler<TextDiffView>((v, e) =>
+            UseSideBySideDiffProperty.Changed.AddClassHandler<TextDiffView>((v, _) =>
             {
                 if (v.DataContext is Models.TextDiff diff)
                 {
@@ -842,11 +838,7 @@ namespace SourceGit.Views
                 return;
 
             if (startLine > endLine)
-            {
-                var tmp = startLine;
-                startLine = endLine;
-                endLine = tmp;
-            }
+                (startLine, endLine) = (endLine, startLine);
 
             var selection = GetUnifiedSelection(diff, startLine, endLine, isOldSide);
             if (!selection.HasChanges)
@@ -868,7 +860,7 @@ namespace SourceGit.Views
                     stage.Click += (_, e) =>
                     {
                         var workcopy = workcopyView.DataContext as ViewModels.WorkingCopy;
-                        workcopy.StageChanges(new List<Models.Change> { change });
+                        workcopy?.StageChanges(new List<Models.Change> { change });
                         e.Handled = true;
                     };
 
@@ -878,7 +870,7 @@ namespace SourceGit.Views
                     discard.Click += (_, e) =>
                     {
                         var workcopy = workcopyView.DataContext as ViewModels.WorkingCopy;
-                        workcopy.Discard(new List<Models.Change> { change }, true);
+                        workcopy?.Discard(new List<Models.Change> { change }, true);
                         e.Handled = true;
                     };
 
@@ -893,7 +885,7 @@ namespace SourceGit.Views
                     unstage.Click += (_, e) =>
                     {
                         var workcopy = workcopyView.DataContext as ViewModels.WorkingCopy;
-                        workcopy.UnstageChanges(new List<Models.Change> { change });
+                        workcopy?.UnstageChanges(new List<Models.Change> { change });
                         e.Handled = true;
                     };
 
@@ -903,7 +895,7 @@ namespace SourceGit.Views
                     discard.Click += (_, e) =>
                     {
                         var workcopy = workcopyView.DataContext as ViewModels.WorkingCopy;
-                        workcopy.Discard(new List<Models.Change> { change }, false);
+                        workcopy?.Discard(new List<Models.Change> { change }, false);
                         e.Handled = true;
                     };
 
@@ -925,6 +917,9 @@ namespace SourceGit.Views
                     stage.Click += (_, e) =>
                     {
                         var repo = repoView.DataContext as ViewModels.Repository;
+                        if (repo == null)
+                            return;
+
                         repo.SetWatcherEnabled(false);
 
                         var tmpFile = Path.GetTempFileName();
@@ -957,6 +952,9 @@ namespace SourceGit.Views
                     discard.Click += (_, e) =>
                     {
                         var repo = repoView.DataContext as ViewModels.Repository;
+                        if (repo == null)
+                            return;
+
                         repo.SetWatcherEnabled(false);
 
                         var tmpFile = Path.GetTempFileName();
@@ -994,6 +992,9 @@ namespace SourceGit.Views
                     unstage.Click += (_, e) =>
                     {
                         var repo = repoView.DataContext as ViewModels.Repository;
+                        if (repo == null)
+                            return;
+
                         repo.SetWatcherEnabled(false);
 
                         var treeGuid = new Commands.QueryStagedFileBlobGuid(ctx.RepositoryPath, change.Path).Result();
@@ -1025,6 +1026,9 @@ namespace SourceGit.Views
                     discard.Click += (_, e) =>
                     {
                         var repo = repoView.DataContext as ViewModels.Repository;
+                        if (repo == null)
+                            return;
+
                         repo.SetWatcherEnabled(false);
 
                         var tmpFile = Path.GetTempFileName();

src/Views/Welcome.axaml.cs

@@ -7,6 +7,7 @@ using Avalonia.Input;
 using Avalonia.Interactivity;
 using Avalonia.Platform.Storage;
 using Avalonia.Threading;
+using Avalonia.VisualTree;
 
 namespace SourceGit.Views
 {
@@ -17,7 +18,7 @@ namespace SourceGit.Views
             InitializeComponent();
         }
 
-        private void SetupTreeViewDragAndDrop(object sender, RoutedEventArgs e)
+        private void SetupTreeViewDragAndDrop(object sender, RoutedEventArgs _)
         {
             if (sender is TreeView view)
             {
@@ -27,7 +28,7 @@ namespace SourceGit.Views
             }
         }
 
-        private void SetupTreeNodeDragAndDrop(object sender, RoutedEventArgs e)
+        private void SetupTreeNodeDragAndDrop(object sender, RoutedEventArgs _)
         {
             if (sender is Grid grid)
             {
@@ -62,7 +63,7 @@ namespace SourceGit.Views
             }
         }
 
-        private void OnPointerReleasedOnTreeNode(object sender, PointerReleasedEventArgs e)
+        private void OnPointerReleasedOnTreeNode(object _1, PointerReleasedEventArgs _2)
         {
             _pressedTreeNode = false;
             _startDragTreeNode = false;
@@ -70,7 +71,8 @@ namespace SourceGit.Views
 
         private void OnPointerMovedOverTreeNode(object sender, PointerEventArgs e)
         {
-            if (_pressedTreeNode && !_startDragTreeNode && sender is Grid grid)
+            if (_pressedTreeNode && !_startDragTreeNode &&
+                sender is Grid { DataContext: ViewModels.RepositoryNode node } grid)
             {
                 var delta = e.GetPosition(grid) - _pressedTreeNodePosition;
                 var sizeSquired = delta.X * delta.X + delta.Y * delta.Y;
@@ -80,12 +82,12 @@ namespace SourceGit.Views
                 _startDragTreeNode = true;
 
                 var data = new DataObject();
-                data.Set("MovedRepositoryTreeNode", grid.DataContext);
+                data.Set("MovedRepositoryTreeNode", node);
                 DragDrop.DoDragDrop(e, data, DragDropEffects.Move);
             }
         }
 
-        private void OnTreeViewLostFocus(object sender, RoutedEventArgs e)
+        private void OnTreeViewLostFocus(object _1, RoutedEventArgs _2)
         {
             _pressedTreeNode = false;
             _startDragTreeNode = false;
@@ -107,27 +109,27 @@ namespace SourceGit.Views
 
         private async void DropOnTreeView(object sender, DragEventArgs e)
         {
-            if (e.Data.Contains("MovedRepositoryTreeNode"))
+            if (e.Data.Get("MovedRepositoryTreeNode") is ViewModels.RepositoryNode moved)
             {
                 e.Handled = true;
 
-                var moved = e.Data.Get("MovedRepositoryTreeNode") as ViewModels.RepositoryNode;
-                if (moved != null && DataContext is ViewModels.Welcome vm)
-                {
+                if (DataContext is ViewModels.Welcome vm)
                     vm.MoveNode(moved, null);
             }
-            }
             else if (e.Data.Contains(DataFormats.Files))
             {
                 e.Handled = true;
 
                 var items = e.Data.GetFiles();
+                if (items != null)
+                {
                     foreach (var item in items)
                     {
                         await OpenOrInitRepository(item.Path.LocalPath);
                         break;
                     }
                 }
+            }
 
             _pressedTreeNode = false;
             _startDragTreeNode = false;
@@ -160,8 +162,7 @@ namespace SourceGit.Views
 
         private async void DropOnTreeNode(object sender, DragEventArgs e)
         {
-            var grid = sender as Grid;
-            if (grid == null)
+            if (sender is not Grid grid)
                 return;
 
             var to = grid.DataContext as ViewModels.RepositoryNode;
@@ -171,27 +172,27 @@ namespace SourceGit.Views
                 return;
             }
 
-            if (e.Data.Contains("MovedRepositoryTreeNode"))
+            if (e.Data.Get("MovedRepositoryTreeNode") is ViewModels.RepositoryNode moved)
             {
                 e.Handled = true;
 
-                var moved = e.Data.Get("MovedRepositoryTreeNode") as ViewModels.RepositoryNode;
-                if (to != null && moved != null && to != moved && DataContext is ViewModels.Welcome vm)
-                {
+                if (to != moved && DataContext is ViewModels.Welcome vm)
                     vm.MoveNode(moved, to);
             }
-            }
             else if (e.Data.Contains(DataFormats.Files))
             {
                 e.Handled = true;
 
                 var items = e.Data.GetFiles();
+                if (items != null)
+                {
                     foreach (var item in items)
                     {
                         await OpenOrInitRepository(item.Path.LocalPath, to);
                         break;
                     }
                 }
+            }
 
             _pressedTreeNode = false;
             _startDragTreeNode = false;
@@ -200,39 +201,36 @@ namespace SourceGit.Views
         private void OnDoubleTappedTreeNode(object sender, TappedEventArgs e)
         {
             var grid = sender as Grid;
-            if (grid == null)
+            var to = grid?.DataContext as ViewModels.RepositoryNode;
+            if (to is not { IsRepository: true })
                 return;
 
-            var to = grid.DataContext as ViewModels.RepositoryNode;
-            if (to == null || !to.IsRepository)
-            {
-                return;
-            }
+            var parent = this.FindAncestorOfType<Launcher>();
+            if (parent?.DataContext is ViewModels.Launcher launcher)
+                launcher.OpenRepositoryInTab(to, null);
 
-            var launcher = TopLevel.GetTopLevel(this).DataContext as ViewModels.Launcher;
-            launcher.OpenRepositoryInTab(to, launcher.ActivePage);
             e.Handled = true;
         }
 
-        private async void OpenLocalRepository(object sender, RoutedEventArgs e)
+        private async void OpenLocalRepository(object _1, RoutedEventArgs e)
         {
             if (!ViewModels.PopupHost.CanCreatePopup())
                 return;
 
             var topLevel = TopLevel.GetTopLevel(this);
+            if (topLevel == null)
+                return;
+
             var options = new FolderPickerOpenOptions() { AllowMultiple = false };
             var selected = await topLevel.StorageProvider.OpenFolderPickerAsync(options);
             if (selected.Count == 1)
-            {
                 await OpenOrInitRepository(selected[0].Path.LocalPath);
-            }
+
+            e.Handled = true;
         }
 
         private Task OpenOrInitRepository(string path, ViewModels.RepositoryNode parent = null)
         {
-            var launcher = TopLevel.GetTopLevel(this).DataContext as ViewModels.Launcher;
-            var page = launcher.ActivePage;
-
             if (!Directory.Exists(path))
             {
                 if (File.Exists(path))
@@ -241,15 +239,18 @@ namespace SourceGit.Views
                     return null;
             }
 
+            var owner = this.FindAncestorOfType<Launcher>();
+            var launcher = owner?.DataContext as ViewModels.Launcher;
+            if (launcher == null)
+                return null;
+
+            var page = launcher.ActivePage;
             return Task.Run(() =>
             {
                 var root = new Commands.QueryRepositoryRootPath(path).Result();
                 if (string.IsNullOrEmpty(root))
                 {
-                    Dispatcher.UIThread.Invoke(() =>
-                    {
-                        (DataContext as ViewModels.Welcome).InitRepository(path, parent);
-                    });
+                    Dispatcher.UIThread.Invoke(() => (DataContext as ViewModels.Welcome)?.InitRepository(path, parent));
                     return;
                 }
 

src/Views/WorkingCopy.axaml.cs

@@ -42,7 +42,7 @@ namespace SourceGit.Views
             }
         }
 
-        private void OnUnstagedChangeDoubleTapped(object sender, RoutedEventArgs e)
+        private void OnUnstagedChangeDoubleTapped(object _, RoutedEventArgs e)
         {
             if (DataContext is ViewModels.WorkingCopy vm)
             {
@@ -51,7 +51,7 @@ namespace SourceGit.Views
             }
         }
 
-        private void OnStagedChangeDoubleTapped(object sender, RoutedEventArgs e)
+        private void OnStagedChangeDoubleTapped(object _, RoutedEventArgs e)
         {
             if (DataContext is ViewModels.WorkingCopy vm)
             {
@@ -60,7 +60,7 @@ namespace SourceGit.Views
             }
         }
 
-        private void OnUnstagedKeyDown(object sender, KeyEventArgs e)
+        private void OnUnstagedKeyDown(object _, KeyEventArgs e)
         {
             if (DataContext is ViewModels.WorkingCopy vm && e.Key == Key.Space)
             {
@@ -69,7 +69,7 @@ namespace SourceGit.Views
             }
         }
 
-        private void OnStagedKeyDown(object sender, KeyEventArgs e)
+        private void OnStagedKeyDown(object _, KeyEventArgs e)
         {
             if (DataContext is ViewModels.WorkingCopy vm && e.Key == Key.Space)
             {