Storyboard Class

<phone:PhoneApplicationPage x:Class="interactive_animation.Page"
  xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" 
  xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:phone="clr-namespace:Microsoft.Phone.Controls;assembly=Microsoft.Phone"
xmlns:shell="clr-namespace:Microsoft.Phone.Shell;assembly=Microsoft.Phone" mc:Ignorable="d" xmlns:d="http://schemas.microsoft.com/expression/blend/2008" xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" d:DesignHeight="800" d:DesignWidth="480">
    <StackPanel>
        <TextBlock Margin="10" TextWrapping="Wrap">This sample uses the Begin, Pause, Resume, and Stop methods to control an animation.</TextBlock>
        <Canvas>
            <Canvas.Resources>
                <Storyboard x:Name="myStoryboard">

                    <!-- Animate the center point of the ellipse. -->
                    <PointAnimation Storyboard.TargetProperty="Center"
          Storyboard.TargetName="MyAnimatedEllipseGeometry"
          Duration="0:0:5"
          From="20,200"
          To="400,100"
          RepeatBehavior="Forever" />
                </Storyboard>
            </Canvas.Resources>

            <Path Fill="Blue">
                <Path.Data>
                    <!-- Describes an ellipse. -->
                    <EllipseGeometry x:Name="MyAnimatedEllipseGeometry"
          Center="20,20" RadiusX="15" RadiusY="15" />
                </Path.Data>
            </Path>

            <StackPanel Orientation="Horizontal" Canvas.Left="0" Canvas.Top="265">
                <!-- Button that begins animation. -->
                <Button Click="Animation_Begin"
        Content="Begin" />

                <!-- Button that pauses Animation. -->
                <Button Click="Animation_Pause"
        Content="Pause" />

                <!-- Button that resumes Animation. -->
                <Button Click="Animation_Resume"
        Content="Resume" />

                <!-- Button that stops Animation. Stopping the animation returns the
        ellipse to its original location. -->
                <Button Click="Animation_Stop"
        Content="Stop" />
            </StackPanel>

        </Canvas>
    </StackPanel>
</phone:PhoneApplicationPage>