<Page xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" x:Class="Microsoft.Samples.Graphics.AnimateGeometryDrawingExample" Title="Using a DrawingBrush"> <DockPanel Name="myAnimatedDrawing" Height="400" Width="400"> <DockPanel.Background> <DrawingBrush TileMode="FlipXY" Viewport="0,0,100,100" ViewportUnits="Absolute" Viewbox="0,0,1,1" ViewboxUnits="Absolute"> <DrawingBrush.Drawing> <GeometryDrawing > <GeometryDrawing.Pen> <Pen Brush="Orange" Thickness="0.1" /> </GeometryDrawing.Pen> <GeometryDrawing.Geometry> <EllipseGeometry RadiusX="0.45" RadiusY="0.2" Center="0.5,0.5" /> </GeometryDrawing.Geometry> </GeometryDrawing> </DrawingBrush.Drawing> </DrawingBrush> </DockPanel.Background> </DockPanel> <Page.Triggers> <EventTrigger RoutedEvent="Page.Loaded"> <BeginStoryboard> <Storyboard> <DoubleAnimation Storyboard.TargetName="myAnimatedDrawing" Storyboard.TargetProperty="(DockPanel.Background).(DrawingBrush.Drawing).(GeometryDrawing.Geometry).(EllipseGeometry.RadiusX)" From="0.01" To="0.5" Duration="0:0:10" AutoReverse="True" RepeatBehavior="Forever" /> </Storyboard> </BeginStoryboard> </EventTrigger> </Page.Triggers> </Page>