How to animate Margin property in WPF

Margin property can be animated using ThicknessAnimation

<Storyboard >
     <ThicknessAnimationUsingKeyFrames Storyboard.TargetProperty="Margin" BeginTime="00:00:00">
        <SplineThicknessKeyFrame KeyTime="00:00:00" Value="134, 70,0,0" />
        <SplineThicknessKeyFrame KeyTime="00:00:03" Value="50, 70,0,0" />
     </ThicknessAnimationUsingKeyFrames>
</Storyboard>