RotateTransform an ImageBrush
<Window x:Class="Workspace.DockExample" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" Title="Workspace" Width="640" Height="480"> <Rectangle Width="175" Height="90" Stroke="Black"> <Rectangle.Fill> <ImageBrush ImageSource="c:\image.jpg"> <ImageBrush.RelativeTransform> <RotateTransform CenterX="0.5" CenterY="0.5" Angle="45" /> </ImageBrush.RelativeTransform> </ImageBrush> </Rectangle.Fill> </Rectangle> </Window>