diff --git a/SPRView.Net.CLI/Cli/InformationCommand.cs b/SPRView.Net.CLI/Cli/InformationCommand.cs
index c3f7247..d4be6e8 100644
--- a/SPRView.Net.CLI/Cli/InformationCommand.cs
+++ b/SPRView.Net.CLI/Cli/InformationCommand.cs
@@ -14,11 +14,11 @@ public class InformationCommand : ICommand
     private string Pad(object src, int len = 12)
     {
         string? temp = src.ToString();
-        if(temp == null)
+        if (temp == null)
             return string.Empty;
         if (len <= temp.Length)
             return temp;
-        while(temp.Length < len)
+        while (temp.Length < len)
         {
             temp += " ";
         }
@@ -41,9 +41,9 @@ public ValueTask ExecuteAsync(IConsole console)
                 console.Output.Write(line);
             }
             console.Output.Write("\tPalette:\n");
-            for(int i = 0; i < spr.Palette.Length; i++)
+            for (int i = 0; i < spr.Palette.Length; i++)
             {
-                if(i % 16 == 0)
+                if (i % 16 == 0)
                     console.Output.Write("\n\t\t");
                 Rgba32 rgba = spr.Palette.AtIndex(i);
                 console.Output.Write("■ ".Pastel(Color.FromArgb(rgba.A, rgba.R, rgba.G, rgba.B)));
diff --git a/SPRView.Net.CLI/Cli/PreviewCommand.cs b/SPRView.Net.CLI/Cli/PreviewCommand.cs
index d004dd4..bdcfaaa 100644
--- a/SPRView.Net.CLI/Cli/PreviewCommand.cs
+++ b/SPRView.Net.CLI/Cli/PreviewCommand.cs
@@ -29,7 +29,7 @@ public ValueTask ExecuteAsync(IConsole console)
             int width = image.Width;
             int height = image.Height;
             float ratio = 1.0f;
-            if(width > height)
+            if (width > height)
             {
                 ratio = (float)PreviewSize / width;
                 width = PreviewSize;
@@ -44,10 +44,10 @@ public ValueTask ExecuteAsync(IConsole console)
             image.Mutate(x => x.Resize(width, height));
             for (int i = 0; i < height; i++)
             {
-                for(int j = 0; j < width; j++)
+                for (int j = 0; j < width; j++)
                 {
                     Rgba32 rgba = image[j, i];
-                    console.Output.Write("██".Pastel(System.Drawing.Color.FromArgb(rgba.A,rgba.R,rgba.G,rgba.B)));
+                    console.Output.Write("██".Pastel(System.Drawing.Color.FromArgb(rgba.A, rgba.R, rgba.G, rgba.B)));
                 }
                 console.Output.Write('\n');
             }
diff --git a/SPRView.Net.Lib/Class/Sprite.cs b/SPRView.Net.Lib/Class/Sprite.cs
index a86e445..32f6868 100644
--- a/SPRView.Net.Lib/Class/Sprite.cs
+++ b/SPRView.Net.Lib/Class/Sprite.cs
@@ -1,7 +1,6 @@
 using SixLabors.ImageSharp;
 using SixLabors.ImageSharp.PixelFormats;
 using SPRView.Net.Lib.Interface;
-using System.Diagnostics.CodeAnalysis;
 namespace SPRView.Net.Lib;
 public class CSprite : ISprite
 {
@@ -60,7 +59,7 @@ public CSprite(Stream stream)
     }
     public CSprite(string? path)
     {
-        if(path == null) 
+        if (path == null)
             throw new FileLoadException("Open a null invalid file path");
         using FileStream fs = new(path, FileMode.Open);
         Init(fs);
@@ -70,7 +69,7 @@ public CSprite(string? path)
     public static ISprite Create(Stream stream)
     {
         return new CSprite(stream);
-    } 
+    }
     public static ISprite Create(string? path)
     {
         return new CSprite(path);
@@ -87,7 +86,7 @@ public int GetFrames()
 
     public Image GetImage(int frame)
     {
-        if(frame < 0 || frame >= m_aryFrames.Count)
+        if (frame < 0 || frame >= m_aryFrames.Count)
         {
             throw new IndexOutOfRangeException("Frame index out of bound");
         }
diff --git a/SPRView.Net.Lib/Class/SpriteColorPalette.cs b/SPRView.Net.Lib/Class/SpriteColorPalette.cs
index f4e8075..b7b6cb1 100644
--- a/SPRView.Net.Lib/Class/SpriteColorPalette.cs
+++ b/SPRView.Net.Lib/Class/SpriteColorPalette.cs
@@ -12,8 +12,8 @@ public Rgba32 AtIndex(int index)
     {
         return this[index];
     }
-    private Rgba32[] _color = new Rgba32[size];
-    private int _size = size;
+    private readonly Rgba32[] _color = new Rgba32[size];
+    private readonly int _size = size;
     public int Size { get => _size; }
     public int Length { get => _color.Length; }
     public Rgba32 this[int index]
diff --git a/SPRView.Net/ViewModel/CreateNewViewModel.cs b/SPRView.Net/ViewModel/CreateNewViewModel.cs
index 7061222..46dfdb4 100644
--- a/SPRView.Net/ViewModel/CreateNewViewModel.cs
+++ b/SPRView.Net/ViewModel/CreateNewViewModel.cs
@@ -1,5 +1,4 @@
 using Avalonia.Controls;
-using Avalonia.Controls.Shapes;
 using Avalonia.Media.Imaging;
 using Avalonia.Platform.Storage;
 using Avalonia.Threading;
@@ -44,10 +43,10 @@ protected void OnPropertyChanged([CallerMemberName] string? propertyName = null)
     }
 
     public int PathSelected { get; set; } = 0;
-    private List<string> m_aryImagePaths = [];
+    private readonly List<string> m_aryImagePaths = [];
     public string[] ImagePaths
     {
-        get { return m_aryImagePaths.ToArray(); }
+        get { return [.. m_aryImagePaths]; }
     }
 
     #region Property
@@ -124,7 +123,7 @@ public void MovedownImage()
     #endregion
 
     #region Export
-    private DispatcherTimer animation_timer;
+    private readonly DispatcherTimer animation_timer;
     public void StartPreview()
     {
         if (!animation_timer.IsEnabled)
@@ -184,9 +183,9 @@ public bool SaveValid
     }
     public async void SaveToSpr()
     {
-        if(Export_Width % 2==1|| Export_Height % 2==1)
+        if (Export_Width % 2 == 1 || Export_Height % 2 == 1)
         {
-            var box = MessageBoxWindow.CreateMessageBox(Lang.CreateNew_Export_NotSQRTWarning, null, Lang.Shared_OK, Lang.Shared_Cancel);
+            var box = MessageBoxWindow.CreateMessageBox(Lang!.CreateNew_Export_NotSQRTWarning, null, Lang.Shared_OK, Lang.Shared_Cancel);
             box.Position = new Avalonia.PixelPoint(Parent.Position.X + (int)Parent.Width / 2, Parent.Position.Y + (int)Parent.Height / 2);
             await box.ShowDialog(Parent);
         }
@@ -206,11 +205,11 @@ public async void SaveToSpr()
         {
             //量化
             //降低一个维度，以便统一量化
-            
+
             int buffersize = 0;
             if (UnPackAnimate)
             {
-                foreach(var path in m_aryImagePaths)
+                foreach (var path in m_aryImagePaths)
                 {
                     SixLabors.ImageSharp.Image frame = SixLabors.ImageSharp.Image.Load(path);
                     buffersize += frame.Frames.Count;
@@ -334,7 +333,7 @@ public async void SaveToSpr()
                 }
             }
             Progress = 200;
-            var box = MessageBoxWindow.CreateMessageBox("☑︎💾", null, Lang.Shared_OK, Lang.Shared_Cancel);
+            var box = MessageBoxWindow.CreateMessageBox("☑︎💾", null, Lang!.Shared_OK, Lang.Shared_Cancel);
             box.Position = new Avalonia.PixelPoint(Parent.Position.X + (int)Parent.Width / 2, Parent.Position.Y + (int)Parent.Height / 2);
             await box.ShowDialog(Parent);
         }
diff --git a/SPRView.Net/ViewModel/MainWindowViewModel.cs b/SPRView.Net/ViewModel/MainWindowViewModel.cs
index d6d0479..9e0dcde 100644
--- a/SPRView.Net/ViewModel/MainWindowViewModel.cs
+++ b/SPRView.Net/ViewModel/MainWindowViewModel.cs
@@ -348,7 +348,7 @@ public void SpriteInfoUpdateAll()
     #endregion
 
     #region Command
-    private DispatcherTimer animation_timer;
+    private readonly DispatcherTimer animation_timer;
     public bool IsTimerVliad
     {
         get => animation_timer.IsEnabled;
diff --git a/SPRView.Net/Window/CreateNew.axaml b/SPRView.Net/Window/CreateNew.axaml
index 69ac9fa..6223bd4 100644
--- a/SPRView.Net/Window/CreateNew.axaml
+++ b/SPRView.Net/Window/CreateNew.axaml
@@ -37,7 +37,6 @@
                 <Button Content="{CompiledBinding Lang.CreateNew_RemoveImage}" Command="{CompiledBinding RemoveImage}" MinWidth="150"/>
                 <RepeatButton Content="{CompiledBinding Lang.CreateNew_MoveDownImage}" Command="{CompiledBinding MovedownImage}" MinWidth="150"/>
               </UniformGrid>
-              
               <TextBlock Margin="0 5" Text="{CompiledBinding Lang.CreateNew_Type}"/>
               <ComboBox SelectedIndex="{CompiledBinding Type}" MinWidth="300">
                 <ComboBoxItem Content="{CompiledBinding Lang.CreateNew_Type_ParallelUpright}"/>
diff --git a/SPRView.Net/Window/MessageBox.axaml.cs b/SPRView.Net/Window/MessageBox.axaml.cs
index 27f11b7..a501d59 100644
--- a/SPRView.Net/Window/MessageBox.axaml.cs
+++ b/SPRView.Net/Window/MessageBox.axaml.cs
@@ -5,20 +5,17 @@ namespace SPRView.Net;
 
 public partial class MessageBoxWindow : Window
 {
-    public MessageBoxWindow()
-    {
-        InitializeComponent();
-    }
+    public MessageBoxWindow() => InitializeComponent();
     public static MessageBoxWindow CreateMessageBox(string message, string? title = null, string? ok = null, string? cancel = null)
     {
         var box = new MessageBoxWindow();
-        box.FindControl<TextBlock>("Message").Text = message;
+        box.FindControl<TextBlock>("Message")!.Text = message;
         if (title != null)
-            box.FindControl<TextBlock>("Title").Text = title;
-        if(ok != null)
-            box.FindControl<Button>("OK").Content = ok;
+            box.FindControl<TextBlock>("Title")!.Text = title;
+        if (ok != null)
+            box.FindControl<Button>("OK")!.Content = ok;
         if (cancel != null)
-            box.FindControl<Button>("Cancel").Content = cancel;
+            box.FindControl<Button>("Cancel")!.Content = cancel;
         return box;
     }
     public void Button_Click(object? obj, RoutedEventArgs e)