WPF:使用ControlTriggers中的dependancy属性中的值更新前景

<Window x:Class="WpfApp.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        Title="WPF ControlTriggers Example" Height="450" Width="800">
    <Grid>
        <Button Content="Click Me">
            <Button.Style>
                <Style TargetType="Button">
                    <Setter Property="Foreground" Value="Black" />
                    <Style.Triggers>
                        <Trigger Property="IsMouseOver" Value="True">
                            <Setter Property="Foreground" Value="Red" />
                        </Trigger>
                    </Style.Triggers>
                </Style>
            </Button.Style>
        </Button>
    </Grid>
</Window>