是的，你必须设置 HasSystemDecorations="false" 并实现你自己的标题栏。我在 Github 上有一个基本的模板，告诉你如何使用0.10版本和流畅的主题来做这件事。

这实际上非常简单，因为Avalonia提供了许多方便的方法来实现这一点。

概述：

设置

ExtendClientAreaToDecorationsHint="True"
ExtendClientAreaChromeHints="NoChrome"
ExtendClientAreaTitleBarHeightHint="-1"

然后实现一个标题栏。例如，close按钮可能如下所示：

<Button Width="46"
        VerticalAlignment="Stretch"
        BorderThickness="0"
        Name="CloseButton"
        ToolTip.Tip="Close">
    <Button.Resources>
      <CornerRadius x:Key="ControlCornerRadius">0</CornerRadius>
    </Button.Resources>
    <Button.Styles>
      <Style Selector="Button:pointerover /template/ ContentPresenter#PART_ContentPresenter">
        <Setter Property="Background" Value="Red"/>
      </Style>
      <Style Selector="Button:not(:pointerover) /template/ ContentPresenter#PART_ContentPresenter">
        <Setter Property="Background" Value="Transparent"/>
      </Style>
      <Style Selector="Button:pointerover > Path">
        <Setter Property="Fill" Value="White"/>
      </Style>
      <Style Selector="Button:not(:pointerover) > Path">
        <Setter Property="Fill" Value="{DynamicResource SystemControlForegroundBaseHighBrush}"/>
      </Style>
    </Button.Styles>
    <Path Margin="10,0,10,0"
          Stretch="Uniform"
          Data="M1169 1024l879 -879l-145 -145l-879 879l-879 -879l-145 145l879 879l-879 879l145 145l879 -879l879 879l145 -145z"></Path>
  </Button>

如果在控件上设置了 IsHitTestVisible="False" ，则可以在该区域中拖动下面的窗口。因此，将整个标题栏包装在例如DockPanel中：

<DockPanel Background="Black"
           IsHitTestVisible="False"
           Name="TitleBarBackground"></DockPanel>

现在，您显然仍然需要模仿按钮的行为。这在原则上可以这样做(同样，对于具体的示例，请查看上面的Github存储库)：

minimizeButton = this.FindControl<Button>("MinimizeButton");
maximizeButton = this.FindControl<Button>("MaximizeButton");
maximizeIcon = this.FindControl<Path>("MaximizeIcon");
maximizeToolTip = this.FindControl<ToolTip>("MaximizeToolTip");
closeButton = this.FindControl<Button>("CloseButton");
windowIcon = this.FindControl<Image>("WindowIcon");
minimizeButton.Click += MinimizeWindow;
maximizeButton.Click += MaximizeWindow;
closeButton.Click += CloseWindow;
windowIcon.DoubleTapped += CloseWindow;
private void CloseWindow(object sender, Avalonia.Interactivity.RoutedEventArgs e)
      Window hostWindow = (Window)this.VisualRoot;
      hostWindow.Close();
private void MaximizeWindow(object sender, Avalonia.Interactivity.RoutedEventArgs e)
     Window hostWindow = (Window)this.VisualRoot;
     if (hostWindow.WindowState == WindowState.Normal)
           hostWindow.WindowState = WindowState.Maximized;
           hostWindow.WindowState = WindowState.Normal;
private void MinimizeWindow(object sender, Avalonia.Interactivity.RoutedEventArgs e)
      Window hostWindow = (Window)this.VisualRoot;
      hostWindow.WindowState = WindowState.Minimized;
}

现在，最后一步是您需要根据窗口状态更改最大化按钮的图标。例如，如果您拖动最大化的窗口，它将自动向下恢复，并且最大化按钮的图标需要更改。因此，您需要订阅主机窗口的窗口状态，这可以像这样完成：

private async void SubscribeToWindowState()
        Window hostWindow = (Window)this.VisualRoot;
        while (hostWindow == null)
            hostWindow = (Window)this.VisualRoot;
            await Task.Delay(50);
        hostWindow.GetObservable(Window.WindowStateProperty).Subscribe(s =>
            if (s != WindowState.Maximized)
                maximizeIcon.Data = Avalonia.Media.Geometry.Parse("M2048 2048v-2048h-2048v2048h2048zM1843 1843h-1638v-1638h1638v1638z");
                hostWindow.Padding = new Thickness(0,0,0,0);
                maximizeToolTip.Content = "Maximize";
            if (s == WindowState.Maximized)