xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" x:Class="Microsoft.Samples.Graphics.RectangleExample" WindowTitle="Example"> Points="50,50 75,30 100,100 130,40" Stroke="Red" StrokeThickness="20" StrokeStartLineCap="Triangle" StrokeEndLineCap="Triangle" Grid.Row="4" Grid.Column="4"/>