<Page xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" x:Class="Microsoft.Samples.Graphics.RectangleExample" WindowTitle="Example"> <Canvas> <Line X1="10" Y1="10" X2="50" Y2="50" StrokeThickness="4" Canvas.Left="100"> <Line.Stroke> <RadialGradientBrush GradientOrigin="0.5,0.5" Center="0.5,0.5" RadiusX="0.5" RadiusY="0.5"> <RadialGradientBrush.GradientStops> <GradientStop Color="Red" Offset="0" /> <GradientStop Color="Blue" Offset="0.25" /> </RadialGradientBrush.GradientStops> </RadialGradientBrush> </Line.Stroke> </Line> </Canvas> </Page>