wpf 样式 触发器

<Window x:Class="GridDemo.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
        xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
        xmlns:local="clr-namespace:GridDemo"
        mc:Ignorable="d"
        Title="MainWindow" Height="300" Width="300">


    <Window.Resources>

        <!--button按钮的样式-->
        <Style TargetType="Button" x:Key="myBtnStyle">
            <Setter Property="Width" Value="100" ></Setter>
            <Setter Property="Height" Value="50" ></Setter>
            <Setter Property="Background" Value="Pink" ></Setter>
            <Style.Triggers>
                <Trigger Property="IsMouseOver" Value="True">
                    <Setter Property="Background" Value="Orange"></Setter>
                </Trigger>
                <Trigger Property="IsMouseOver" Value="False">
                    <Setter Property="Background" Value="Pink"></Setter>
                </Trigger>
            </Style.Triggers>
        </Style>


    </Window.Resources>

    <UniformGrid Columns="2" Rows="2" >
        <Button  Content="Button1" Style="{StaticResource myBtnStyle}"/>
    </UniformGrid>

</Window>