WPF使用动画如何实现抽屉效果

wpf的写法一个Grid包另一个Grid，里面的Grid定宽，外面的动画实现一点点缩小，实现一个抽屉效果，求给个代码，急用

是从左到右推出来的那种抽屉动画吗？

 <Window.Resources>
        <Storyboard x:Key="STORYBOARD_SHOW">
            <ThicknessAnimation To="0,0,0,0" Duration="0:0:0.7" Storyboard.TargetName="grdDrawer" Storyboard.TargetProperty="Margin">
                <ThicknessAnimation.EasingFunction>
                    <CubicEase EasingMode="EaseOut"></CubicEase>
                </ThicknessAnimation.EasingFunction>
            </ThicknessAnimation>
        </Storyboard>
        <Storyboard x:Key="STORYBOARD_HIDE">
            <ThicknessAnimation To="-200,0,0,0" Duration="0:0:0.7" Storyboard.TargetName="grdDrawer" Storyboard.TargetProperty="Margin">
                <ThicknessAnimation.EasingFunction>
                    <CubicEase EasingMode="EaseOut"></CubicEase>
                </ThicknessAnimation.EasingFunction>
            </ThicknessAnimation>
        </Storyboard>
    </Window.Resources>
    <Grid ClipToBounds="True">
        <Grid x:Name="grdDrawer" Width="200" Margin="0,0,0,0" HorizontalAlignment="Left" Background="DimGray" >
            <Grid x:Name="grdContainer" Width="200">
                    <TextBlock><Run Text="CONTAINER1" Foreground="White"></Run></TextBlock>
            </Grid>
        </Grid>
    </Grid>

执行的话用下面的CS语言

/*打开*/
 var storyboard = (Storyboard)FindResource("STORYBOARD_SHOW");
 storyboard.Begin();
 /*关闭*/
 var storyboard = (Storyboard)FindResource("STORYBOARD_HIDE");
storyboard.Begin();