<Canvas
	xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
  xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
  Width="200" Height="200">
  <Rectangle Width="200" Height="200" Fill="#f00" />
  <Rectangle Width="200" Height="200">
		<Rectangle.Fill>
			<LinearGradientBrush SpreadMethod="Reflect" StartPoint="0,0" EndPoint="1.0,1.0">
				<LinearGradientBrush.GradientStops>
					<GradientStop Color="#ffff" Offset="0.0" />
					<GradientStop Color="#0fff" Offset="1.0" />
				</LinearGradientBrush.GradientStops>
			</LinearGradientBrush>
		</Rectangle.Fill>
	</Rectangle>
</Canvas>
