Vertical linear gradient
<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'> <StackPanel> <TextBlock Margin="5" Text="Vertical linear gradient:" /> <Rectangle Width="100" Height="75" Stroke="Blue"> <Rectangle.Fill> <LinearGradientBrush StartPoint="0,0" EndPoint="1,0"> <GradientStop Color="Blue" Offset="0" /> <GradientStop Color="Red" Offset="0.5" /> <GradientStop Color="Yellow" Offset="1" /> </LinearGradientBrush> </Rectangle.Fill> </Rectangle> </StackPanel> </UserControl>