Rectangles and Animation
<UserControl x:Class='SilverlightApplication3.MainPage' xmlns='http://schemas.microsoft.com/winfx/2006/xaml/presentation' xmlns:x='http://schemas.microsoft.com/winfx/2006/xaml' xmlns:d='http://schemas.microsoft.com/expression/blend/2008' xmlns:mc='http://schemas.openxmlformats.org/markup-compatibility/2006' mc:Ignorable='d' d:DesignWidth='640' d:DesignHeight='480'> <Canvas> <Rectangle Name="rectangle1" Width="50" Height="100" Canvas.Left="50" Canvas.Top="50" Fill="Red" Stroke="Black" StrokeThickness="4"> <Rectangle.Triggers> <EventTrigger RoutedEvent="Rectangle.Loaded"> <EventTrigger.Actions> <BeginStoryboard> <Storyboard Storyboard.TargetProperty="Width" Storyboard.TargetName="rectangle1"> <DoubleAnimation From="50" To="200" Duration="0:0:5"/> </Storyboard> </BeginStoryboard> </EventTrigger.Actions> </EventTrigger> </Rectangle.Triggers> </Rectangle> </Canvas> </UserControl>