<Window x:Class="Workspace.DockExample"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
Title="Workspace" Width="640" Height="480">
<Image Source="c:\image.jpg"
Width="200" Height="150" HorizontalAlignment="Left">
<Image.Clip>
<EllipseGeometry x:Name="MyEllipseGeometry1"
RadiusX="100"
RadiusY="75"
Center="100,75"/>
</Image.Clip>
<Image.Triggers>
<EventTrigger RoutedEvent="Image.Loaded">
<BeginStoryboard>
<Storyboard>
<PointAnimation
Storyboard.TargetName="MyEllipseGeometry1"
Storyboard.TargetProperty="(EllipseGeometry.Center)"
From="0,0" To="200,150" Duration="0:0:3" RepeatBehavior="Forever"
AutoReverse="True" />
</Storyboard>
</BeginStoryboard>
</EventTrigger>
</Image.Triggers>
</Image>
</Window>