Polygon Stretch=Fill

<Page xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    x:Class="Microsoft.Samples.Graphics.RectangleExample"
    WindowTitle="Rectangle">
  <Canvas>
     <Polygon Height="90" Width="40" Points="0,0 9,9 0,9" Fill="Aqua" Stretch="Fill"/>
  </Canvas>
</Page>

