WPF(Trigger)

<Window x:Class="TestResourcesTriggle.MainWindow"        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"        Title="MainWindow" Height="350" Width="525">        <Window.Resources>        <Style TargetType="CheckBox" >            <Style.Triggers>                <Trigger Property="IsChecked" Value="true" >                    <Trigger.Setters >                        <Setter Property="FontSize" Value="20" />                        <Setter Property="Foreground" Value="Orange" />                    </Trigger.Setters>                </Trigger>            </Style.Triggers>        </Style>    </Window.Resources>            <StackPanel >        <CheckBox Content="悄悄的我走了" Margin="5" />        <CheckBox Content="正如我悄悄的来" Margin="5,0" />        <CheckBox Content="我挥一挥衣袖" Margin="5" />        <CheckBox Content="不带走一片云彩" Margin="5,0" Width="496" />    </StackPanel>    </Window>