Set rectangle Stroke Dash Array
<UserControl x:Class='SilverlightApplication3.MainPage' 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'> <Canvas> <Rectangle Canvas.Top="100" Canvas.Left="100" Width="200" Height="150" StrokeDashArray="4 1 2 1" StrokeThickness="8" Stroke="Black" Opacity=".5" Fill="Blue"/> </Canvas> </UserControl>