<Button Height="50" BorderBrush="IndianRed" Margin="5,0,0,0"
x:Name="aBtn">
<Button.Resources>
<SolidColorBrush x:Key="ButtonBackgroundPointerOver" Color="IndianRed"/>
</Button.Resources>
<StackPanel Orientation="Vertical">
<TextBlock Text="Heating" />
</StackPanel>
<iActivity:Interaction.Behaviors>
<iAction:ChangePropertyAction PropertyName="Background" Value="IndianRed" TargetObject="aBtn" />
</iActivity:Interaction.Behaviors>
这行不通。(我使用的是 WinUI3 Preview 4)