AvaloniaExample/MVVMExample/Views/MainWindow.axaml

<Window xmlns="https://github.com/avaloniaui"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:vm="using:MVVMExample.ViewModels"
        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"
        x:Class="MVVMExample.Views.MainWindow"
        x:DataType="vm:MainWindowViewModel"
        SystemDecorations="None" 
        Icon="/Assets/avalonia-logo.ico"
        Title="MVVMExample"
        CanResize="True">
    <Window.Styles>
		<Style Selector="Window">
			<Setter Property="Background" Value="#0F000000"/>
        </Style>
    </Window.Styles>
    <Design.DataContext>
        <vm:MainWindowViewModel/>
    </Design.DataContext>
    <Grid>
        <Grid.RowDefinitions>
            <RowDefinition Height="Auto"/> <!-- 标题栏行 -->
            <RowDefinition Height="*"/> <!-- 内容行 -->
            <RowDefinition Height="40"/>
        </Grid.RowDefinitions>
        <!-- 自定义标题栏 -->
        <Border Grid.Row="0" Height="40" Background="#007ACC" PointerPressed="TitleBar_PointerPressed"> <!-- 绑定拖拽事件 -->
            <Grid Margin="10,0">
                <TextBlock VerticalAlignment="Center" Foreground="White" Text="{Binding Path=Title, RelativeSource={RelativeSource AncestorType=Window}}"/>
                <StackPanel HorizontalAlignment="Right" Orientation="Horizontal" Spacing="8">
                    <Button x:Name="MinimizeBtn" Content="─" Width="40" Click="MinimizeBtn_Click"/>
                    <Button x:Name="MaximizeBtn" Content="□" Width="40" Click="MaximizeBtn_Click"/>
                    <Button x:Name="CloseBtn" Content="✕" Width="40" Background="Red" Click="CloseBtn_Click"/>
                </StackPanel>
            </Grid>
        </Border>
        <!-- 主内容区 -->
        <Border Grid.Row="1" Background="White">
            <TextBlock Text="你的应用内容在这里" HorizontalAlignment="Center" VerticalAlignment="Center"/>
        </Border>
        <Border Grid.Row="2" Width="40" Height="40" Background="Red" HorizontalAlignment="Right" PointerPressed="Bar_PointerPressed"/>
    </Grid>
</Window>