diff --git a/demo/Semi.Avalonia.Demo/Pages/ManagedFileChooserDemo.axaml b/demo/Semi.Avalonia.Demo/Pages/ManagedFileChooserDemo.axaml
index dcb845f..418e8c4 100644
--- a/demo/Semi.Avalonia.Demo/Pages/ManagedFileChooserDemo.axaml
+++ b/demo/Semi.Avalonia.Demo/Pages/ManagedFileChooserDemo.axaml
@@ -8,8 +8,13 @@
     d:DesignWidth="800"
     mc:Ignorable="d">
     <StackPanel HorizontalAlignment="Left" Spacing="10">
-        <Button Name="openFileDialog">Open File</Button>
-        <Button Name="selectFolderDialog">Select Folder</Button>
-        <Button Name="saveFileDialog">Save File</Button>
+        <StackPanel.Styles>
+            <Style Selector="Button">
+                <Setter Property="HorizontalAlignment" Value="Stretch" />
+            </Style>
+        </StackPanel.Styles>
+        <Button Name="OpenFileButton" Content="Open File" />
+        <Button Name="SelectFolderButton" Content="Select Folder" />
+        <Button Name="SaveFileButton" Content="Save File" />
     </StackPanel>
 </UserControl>
diff --git a/demo/Semi.Avalonia.Demo/Pages/ManagedFileChooserDemo.axaml.cs b/demo/Semi.Avalonia.Demo/Pages/ManagedFileChooserDemo.axaml.cs
index 18d5ab2..80fdf60 100644
--- a/demo/Semi.Avalonia.Demo/Pages/ManagedFileChooserDemo.axaml.cs
+++ b/demo/Semi.Avalonia.Demo/Pages/ManagedFileChooserDemo.axaml.cs
@@ -1,10 +1,6 @@
-using System;
 using System.Collections.Generic;
-using Avalonia;
 using Avalonia.Controls;
-using Avalonia.Dialogs;
 using Avalonia.Interactivity;
-using Avalonia.Markup.Xaml;
 using Avalonia.Platform.Storage;
 
 namespace Semi.Avalonia.Demo.Pages;
@@ -14,14 +10,14 @@ public partial class ManagedFileChooserDemo : UserControl
     public ManagedFileChooserDemo()
     {
         InitializeComponent();
-        openFileDialog.Click += OpenFileDialog;
-        selectFolderDialog.Click += SelectFolderDialog;
-        saveFileDialog.Click += SaveFileDialog;
+        OpenFileButton.Click += OpenFileDialog;
+        SelectFolderButton.Click += SelectFolderDialog;
+        SaveFileButton.Click += SaveFileDialog;
     }
 
-    private async void OpenFileDialog(object sender, RoutedEventArgs args)
+    private async void OpenFileDialog(object? sender, RoutedEventArgs args)
     {
-        IStorageProvider? sp = GetStorageProvider();
+        var sp = GetStorageProvider();
         if (sp is null) return;
         var result = await sp.OpenFilePickerAsync(new FilePickerOpenOptions()
         {
@@ -30,9 +26,10 @@ public partial class ManagedFileChooserDemo : UserControl
             AllowMultiple = true,
         });
     }
-    private async void SelectFolderDialog(object sender, RoutedEventArgs args)
+
+    private async void SelectFolderDialog(object? sender, RoutedEventArgs args)
     {
-        IStorageProvider? sp = GetStorageProvider();
+        var sp = GetStorageProvider();
         if (sp is null) return;
         var result = await sp.OpenFolderPickerAsync(new FolderPickerOpenOptions()
         {
@@ -40,16 +37,17 @@ public partial class ManagedFileChooserDemo : UserControl
             AllowMultiple = true,
         });
     }
-    private async void SaveFileDialog(object sender, RoutedEventArgs args)
+
+    private async void SaveFileDialog(object? sender, RoutedEventArgs args)
     {
-        IStorageProvider? sp = GetStorageProvider();
+        var sp = GetStorageProvider();
         if (sp is null) return;
         var result = await sp.SaveFilePickerAsync(new FilePickerSaveOptions()
         {
-            Title = "Open File",
+            Title = "Save File",
         });
     }
-    
+
     private IStorageProvider? GetStorageProvider()
     {
         var topLevel = TopLevel.GetTopLevel(this);
@@ -58,10 +56,10 @@ public partial class ManagedFileChooserDemo : UserControl
 
     List<FilePickerFileType>? GetFileTypes()
     {
-        return new List<FilePickerFileType>
-        {
+        return
+        [
             FilePickerFileTypes.All,
             FilePickerFileTypes.TextPlain
-        };
+        ];
     }
 }
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