xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" x:Class="Microsoft.Samples.Graphics.RectangleExample" WindowTitle="Example"> Width="100" Height="50" Margin="5" HorizontalAlignment="Left"> Width="100" Height="50" Margin="5" HorizontalAlignment="Left"> Width="100" Height="50" > Width="100" Height="50" >