diff --git a/demo/Semi.Avalonia.Demo/Pages/GridSplitter.axaml b/demo/Semi.Avalonia.Demo/Pages/GridSplitterDemo.axaml
similarity index 80%
rename from demo/Semi.Avalonia.Demo/Pages/GridSplitter.axaml
rename to demo/Semi.Avalonia.Demo/Pages/GridSplitterDemo.axaml
index 0928a67..ef965c6 100644
--- a/demo/Semi.Avalonia.Demo/Pages/GridSplitter.axaml
+++ b/demo/Semi.Avalonia.Demo/Pages/GridSplitterDemo.axaml
@@ -1,5 +1,5 @@
 <UserControl
-    x:Class="Semi.Avalonia.Demo.Pages.GridSplitter"
+    x:Class="Semi.Avalonia.Demo.Pages.GridSplitterDemo"
     xmlns="https://github.com/avaloniaui"
     xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
     xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
@@ -14,13 +14,13 @@
             RowDefinitions="*, Auto, *">
             <Border
                 HorizontalAlignment="Stretch"
-                Background="#FEFBCB"
+                Background="{DynamicResource SemiYellow3Color}"
                 CornerRadius="10" />
             <GridSplitter Grid.Row="1" ShowsPreview="True" />
             <Border
                 Grid.Row="2"
                 HorizontalAlignment="Stretch"
-                Background="#FEFBCB"
+                Background="{DynamicResource SemiYellow3Color}"
                 CornerRadius="10" />
         </Grid>
         <Grid
@@ -29,13 +29,13 @@
             ColumnDefinitions="*, Auto, *">
             <Border
                 HorizontalAlignment="Stretch"
-                Background="#FEFBCB"
+                Background="{DynamicResource SemiYellow3Color}"
                 CornerRadius="10" />
             <GridSplitter Grid.Column="1" ShowsPreview="True" />
             <Border
                 Grid.Column="2"
                 HorizontalAlignment="Stretch"
-                Background="#FEFBCB"
+                Background="{DynamicResource SemiYellow3Color}"
                 CornerRadius="10" />
         </Grid>
     </StackPanel>
diff --git a/demo/Semi.Avalonia.Demo/Pages/GridSplitter.axaml.cs b/demo/Semi.Avalonia.Demo/Pages/GridSplitterDemo.axaml.cs
similarity index 71%
rename from demo/Semi.Avalonia.Demo/Pages/GridSplitter.axaml.cs
rename to demo/Semi.Avalonia.Demo/Pages/GridSplitterDemo.axaml.cs
index c317cf5..b3f1927 100644
--- a/demo/Semi.Avalonia.Demo/Pages/GridSplitter.axaml.cs
+++ b/demo/Semi.Avalonia.Demo/Pages/GridSplitterDemo.axaml.cs
@@ -1,12 +1,11 @@
-using Avalonia;
 using Avalonia.Controls;
 using Avalonia.Markup.Xaml;
 
 namespace Semi.Avalonia.Demo.Pages;
 
-public partial class GridSplitter : UserControl
+public partial class GridSplitterDemo : UserControl
 {
-    public GridSplitter()
+    public GridSplitterDemo()
     {
         InitializeComponent();
     }
diff --git a/demo/Semi.Avalonia.Demo/Views/MainView.axaml b/demo/Semi.Avalonia.Demo/Views/MainView.axaml
index 0c12b22..28ff0a8 100644
--- a/demo/Semi.Avalonia.Demo/Views/MainView.axaml
+++ b/demo/Semi.Avalonia.Demo/Views/MainView.axaml
@@ -42,29 +42,67 @@
                         Text="{ReflectionBinding #tab.SelectedItem.Header}" />
                 </StackPanel>
                 <StackPanel Grid.Column="1" Orientation="Horizontal">
-                    <Button Click="OpenDocumentation" Theme="{DynamicResource BorderlessButton}">
+                    <Button
+                        Click="OpenDocumentation"
+                        Theme="{DynamicResource BorderlessButton}"
+                        Width="32"
+                        Height="32">
                         <PathIcon
-                            Width="16"
-                            Height="16"
+                            Theme="{DynamicResource InnerPathIcon}"
                             Data="M12 21.5C10.65 20.65 8.2 20 6.5 20C4.85 20 3.15 20.3 1.75 21.05C1.65 21.1 1.6 21.1 1.5 21.1C1.25 21.1 1 20.85 1 20.6V6C1.6 5.55 2.25 5.25 3 5C4.11 4.65 5.33 4.5 6.5 4.5C8.45 4.5 10.55 4.9 12 6C13.45 4.9 15.55 4.5 17.5 4.5C18.67 4.5 19.89 4.65 21 5C21.75 5.25 22.4 5.55 23 6V20.6C23 20.85 22.75 21.1 22.5 21.1C22.4 21.1 22.35 21.1 22.25 21.05C20.85 20.3 19.15 20 17.5 20C15.8 20 13.35 20.65 12 21.5M12 8V19.5C13.35 18.65 15.8 18 17.5 18C18.7 18 19.9 18.15 21 18.5V7C19.9 6.65 18.7 6.5 17.5 6.5C15.8 6.5 13.35 7.15 12 8M13 11.5C14.11 10.82 15.6 10.5 17.5 10.5C18.41 10.5 19.26 10.59 20 10.78V9.23C19.13 9.08 18.29 9 17.5 9C15.73 9 14.23 9.28 13 9.84V11.5M17.5 11.67C15.79 11.67 14.29 11.93 13 12.46V14.15C14.11 13.5 15.6 13.16 17.5 13.16C18.54 13.16 19.38 13.24 20 13.4V11.9C19.13 11.74 18.29 11.67 17.5 11.67M20 14.57C19.13 14.41 18.29 14.33 17.5 14.33C15.67 14.33 14.17 14.6 13 15.13V16.82C14.11 16.16 15.6 15.83 17.5 15.83C18.54 15.83 19.38 15.91 20 16.07V14.57Z"
                             Foreground="{DynamicResource ButtonDefaultTertiaryForeground}" />
                     </Button>
-                    <Button Click="OpenRepository" Theme="{DynamicResource BorderlessButton}">
+                    <Button
+                        Click="OpenRepository"
+                        Theme="{DynamicResource BorderlessButton}"
+                        Width="32"
+                        Height="32">
                         <PathIcon
-                            Width="16"
-                            Height="16"
+                            Theme="{DynamicResource InnerPathIcon}"
                             Data="M12,2A10,10 0 0,0 2,12C2,16.42 4.87,20.17 8.84,21.5C9.34,21.58 9.5,21.27 9.5,21C9.5,20.77 9.5,20.14 9.5,19.31C6.73,19.91 6.14,17.97 6.14,17.97C5.68,16.81 5.03,16.5 5.03,16.5C4.12,15.88 5.1,15.9 5.1,15.9C6.1,15.97 6.63,16.93 6.63,16.93C7.5,18.45 8.97,18 9.54,17.76C9.63,17.11 9.89,16.67 10.17,16.42C7.95,16.17 5.62,15.31 5.62,11.5C5.62,10.39 6,9.5 6.65,8.79C6.55,8.54 6.2,7.5 6.75,6.15C6.75,6.15 7.59,5.88 9.5,7.17C10.29,6.95 11.15,6.84 12,6.84C12.85,6.84 13.71,6.95 14.5,7.17C16.41,5.88 17.25,6.15 17.25,6.15C17.8,7.5 17.45,8.54 17.35,8.79C18,9.5 18.38,10.39 18.38,11.5C18.38,15.32 16.04,16.16 13.81,16.41C14.17,16.72 14.5,17.33 14.5,18.26C14.5,19.6 14.5,20.68 14.5,21C14.5,21.27 14.66,21.59 15.17,21.5C19.14,20.16 22,16.42 22,12A10,10 0 0,0 12,2Z"
                             Foreground="{DynamicResource ButtonDefaultTertiaryForeground}" />
                     </Button>
-                    <ComboBox
-                        MinWidth="100"
-                        PlaceholderText="Select a theme"
-                        DisplayMemberBinding="{Binding Name}"
-                        ItemsSource="{Binding Themes}"
-                        SelectedItem="{Binding SelectedTheme}" />
+                    <ToggleSwitch
+                        IsCheckedChanged="ToggleButton_OnIsCheckedChanged"
+                        Theme="{DynamicResource ButtonToggleSwitch}"
+                        Width="32"
+                        Height="32">
+                        <ToggleSwitch.OnContent>
+                            <PathIcon
+                                Theme="{DynamicResource InnerPathIcon}"
+                                Data="M12 23C18.0751 23 23 18.0751 23 12C23 5.92487 18.0751 1 12 1C5.92487 1 1 5.92487 1 12C1 18.0751 5.92487 23 12 23ZM17 15C17.476 15 17.9408 14.9525 18.3901 14.862C17.296 17.3011 14.8464 19 12 19C8.13401 19 5 15.866 5 12C5 8.60996 7.40983 5.78277 10.6099 5.13803C10.218 6.01173 10 6.98041 10 8C10 11.866 13.134 15 17 15Z"
+                                Foreground="{DynamicResource ButtonDefaultTertiaryForeground}" />
+                        </ToggleSwitch.OnContent>
+                        <ToggleSwitch.OffContent>
+                            <PathIcon
+                                Theme="{DynamicResource InnerPathIcon}"
+                                Data="M3.55 19.09L4.96 20.5L6.76 18.71L5.34 17.29M12 6C8.69 6 6 8.69 6 12S8.69 18 12 18 18 15.31 18 12C18 8.68 15.31 6 12 6M20 13H23V11H20M17.24 18.71L19.04 20.5L20.45 19.09L18.66 17.29M20.45 5L19.04 3.6L17.24 5.39L18.66 6.81M13 1H11V4H13M6.76 5.39L4.96 3.6L3.55 5L5.34 6.81L6.76 5.39M1 13H4V11H1M13 20H11V23H13"
+                                Foreground="{DynamicResource ButtonDefaultTertiaryForeground}" />
+                        </ToggleSwitch.OffContent>
+                    </ToggleSwitch>
+
+                    <Button
+                        Theme="{DynamicResource BorderlessButton}"
+                        Width="32"
+                        Height="32">
+                        <PathIcon
+                            Theme="{DynamicResource InnerPathIcon}"
+                            Data="M2 19.5C2 18.6716 2.67157 18 3.5 18H20.5C21.3284 18 22 18.6716 22 19.5C22 20.3284 21.3284 21 20.5 21H3.5C2.67157 21 2 20.3284 2 19.5ZM2 12C2 11.1716 2.67157 10.5 3.5 10.5H20.5C21.3284 10.5 22 11.1716 22 12C22 12.8284 21.3284 13.5 20.5 13.5H3.5C2.67157 13.5 2 12.8284 2 12ZM2 4.5C2 3.67157 2.67157 3 3.5 3H20.5C21.3284 3 22 3.67157 22 4.5C22 5.32843 21.3284 6 20.5 6H3.5C2.67157 6 2 5.32843 2 4.5Z"
+                            Foreground="{DynamicResource ButtonDefaultTertiaryForeground}" />
+                        <Button.Flyout>
+                            <MenuFlyout Placement="Bottom" ItemsSource="{Binding MenuItems}" />
+                        </Button.Flyout>
+                        <Button.Styles>
+                            <Style Selector="MenuItem" x:DataType="views:MenuItemViewModel">
+                                <Setter Property="Header" Value="{Binding Header}" />
+                                <Setter Property="ItemsSource" Value="{Binding Items}" />
+                                <Setter Property="Command" Value="{Binding Command}" />
+                                <Setter Property="CommandParameter" Value="{Binding CommandParameter}" />
+                            </Style>
+                        </Button.Styles>
+                    </Button>
                 </StackPanel>
             </Grid>
-
         </Border>
         <TabControl
             Name="tab"
@@ -126,7 +164,7 @@
                 <pages:FlyoutDemo />
             </TabItem>
             <TabItem Header="GridSplitter">
-                <pages:GridSplitter />
+                <pages:GridSplitterDemo />
             </TabItem>
             <TabItem Header="HeaderedContentControl">
                 <pages:HeaderedContentControlDemo />
@@ -209,4 +247,4 @@
         </TabControl>
     </Grid>
 
-</UserControl>
+</UserControl>
\ No newline at end of file
diff --git a/demo/Semi.Avalonia.Demo/Views/MainView.axaml.cs b/demo/Semi.Avalonia.Demo/Views/MainView.axaml.cs
index 3799536..d3e3d97 100644
--- a/demo/Semi.Avalonia.Demo/Views/MainView.axaml.cs
+++ b/demo/Semi.Avalonia.Demo/Views/MainView.axaml.cs
@@ -1,10 +1,12 @@
 using System;
-using System.Collections.ObjectModel;
+using System.Collections.Generic;
+using System.Windows.Input;
 using Avalonia;
 using Avalonia.Controls;
 using Avalonia.Interactivity;
 using Avalonia.Styling;
 using CommunityToolkit.Mvvm.ComponentModel;
+using CommunityToolkit.Mvvm.Input;
 
 namespace Semi.Avalonia.Demo.Views;
 
@@ -45,32 +47,61 @@ public partial class MainView : UserControl
 
 public partial class MainViewModel : ObservableObject
 {
-    public ObservableCollection<ThemeItem> Themes { get; } =
-    [
-        new("Default", ThemeVariant.Default),
-        new("Light", ThemeVariant.Light),
-        new("Dark", ThemeVariant.Dark),
-        new("Aquatic", SemiTheme.Aquatic),
-        new("Desert", SemiTheme.Desert),
-        new("Dust", SemiTheme.Dust),
-        new("NightSky", SemiTheme.NightSky)
-    ];
+    public IReadOnlyList<MenuItemViewModel> MenuItems { get; }
 
-    [ObservableProperty] private ThemeItem? _selectedTheme;
-
-    partial void OnSelectedThemeChanged(ThemeItem? oldValue, ThemeItem? newValue)
+    public MainViewModel()
+    {
+        MenuItems =
+        [
+            new MenuItemViewModel
+            {
+                Header = "High Contrast Theme",
+                Items =
+                [
+                    new MenuItemViewModel
+                    {
+                        Header = "Aquatic",
+                        Command = SelectThemeCommand,
+                        CommandParameter = SemiTheme.Aquatic
+                    },
+                    new MenuItemViewModel
+                    {
+                        Header = "Desert",
+                        Command = SelectThemeCommand,
+                        CommandParameter = SemiTheme.Desert
+                    },
+                    new MenuItemViewModel
+                    {
+                        Header = "Dust",
+                        Command = SelectThemeCommand,
+                        CommandParameter = SemiTheme.Dust
+                    },
+                    new MenuItemViewModel
+                    {
+                        Header = "NightSky",
+                        Command = SelectThemeCommand,
+                        CommandParameter = SemiTheme.NightSky
+                    },
+                ]
+            }
+        ];
+    }
+
+    [RelayCommand]
+    public void SelectTheme(object? obj)
     {
-        if (newValue is null) return;
         var app = Application.Current;
         if (app is not null)
         {
-            app.RequestedThemeVariant = newValue.Theme;
+            app.RequestedThemeVariant = obj as ThemeVariant;
         }
     }
 }
 
-public class ThemeItem(string name, ThemeVariant theme)
+public class MenuItemViewModel
 {
-    public string Name { get; set; } = name;
-    public ThemeVariant Theme { get; set; } = theme;
+    public string? Header { get; set; }
+    public ICommand? Command { get; set; }
+    public object? CommandParameter { get; set; }
+    public IList<MenuItemViewModel>? Items { get; set; }
 }
\ No newline at end of file