diff --git a/src/SourceGit/App.axaml.cs b/src/SourceGit/App.axaml.cs
index 3e1c38a6..749e40b7 100644
--- a/src/SourceGit/App.axaml.cs
+++ b/src/SourceGit/App.axaml.cs
@@ -1,9 +1,9 @@
 using System;
 using System.Collections;
+using System.Globalization;
 using System.IO;
 using System.Reflection;
 using System.Text;
-using System.Globalization;
 
 using Avalonia;
 using Avalonia.Controls;
diff --git a/src/SourceGit/Converters/StringConverters.cs b/src/SourceGit/Converters/StringConverters.cs
index ea1ddd42..7bd68037 100644
--- a/src/SourceGit/Converters/StringConverters.cs
+++ b/src/SourceGit/Converters/StringConverters.cs
@@ -95,4 +95,4 @@ namespace SourceGit.Converters
 
         public static ToFontFamilyConverter ToFontFamily = new ToFontFamilyConverter();
     }
-}
+}
\ No newline at end of file
diff --git a/src/SourceGit/Models/TextMateHelper.cs b/src/SourceGit/Models/TextMateHelper.cs
index 270cb507..0fe97e52 100644
--- a/src/SourceGit/Models/TextMateHelper.cs
+++ b/src/SourceGit/Models/TextMateHelper.cs
@@ -21,7 +21,7 @@ namespace SourceGit.Models
             else
             {
                 return editor.InstallTextMate(new RegistryOptions(ThemeName.LightPlus));
-            }            
+            }
         }
 
         public static void SetThemeByApp(TextMate.Installation installation)
@@ -58,4 +58,4 @@ namespace SourceGit.Models
             GC.Collect();
         }
     }
-}
+}
\ No newline at end of file
diff --git a/src/SourceGit/Views/TextDiffView.axaml.cs b/src/SourceGit/Views/TextDiffView.axaml.cs
index a321d81e..c432abc7 100644
--- a/src/SourceGit/Views/TextDiffView.axaml.cs
+++ b/src/SourceGit/Views/TextDiffView.axaml.cs
@@ -375,7 +375,7 @@ namespace SourceGit.Views
         }
 
         private TextMate.Installation _textMate;
-        private LineStyleTransformer _lineStyleTransformer = null;
+        private readonly LineStyleTransformer _lineStyleTransformer = null;
     }
 
     public class SingleSideTextDiffPresenter : TextEditor
@@ -780,7 +780,7 @@ namespace SourceGit.Views
         }
 
         private TextMate.Installation _textMate;
-        private LineStyleTransformer _lineStyleTransformer = null;
+        private readonly LineStyleTransformer _lineStyleTransformer = null;
         private ScrollViewer _scrollViewer = null;
         private bool _syncScrollingByOthers = false;
     }