Shapes Silverlight

    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'>
  
      Points="50,50 75,30 100,100 130,40"
    Stroke="Red"
    StrokeThickness="20"
    StrokeLineJoin="Miter"
    Grid.Row="1" Grid.Column="1"/>