Use the StreamGeometry mini-language to create polyline
<Window x:Class="RadialGradientBrushExample" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" Title="Radial Gradient" Height="320" Width="368"> <Canvas> <Path Stroke="Blue" Data="M 100 120 L 200 120 L 200 220 L 100 170"/> </Canvas> </Window> <!-- The first command, M, creates the PathFigure and sets the starting point to (100, 120). The following three commands (L) create line segments. -->