<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="50" Height="50" Grid.Row="1" Grid.Column="1"> <Rectangle.Fill> <DrawingBrush Viewport="0,0,10,10" ViewportUnits="Absolute" TileMode="Tile"> <DrawingBrush.Drawing> <DrawingGroup> <GeometryDrawing Brush="White"> <GeometryDrawing.Geometry> <RectangleGeometry Rect="0,0,1,1" /> </GeometryDrawing.Geometry> </GeometryDrawing> <GeometryDrawing Brush="Blue" Geometry="M 0,0 L 0,1 0.1,1 0.1,0.1 1,0.1 1,0 Z" /> </DrawingGroup> </DrawingBrush.Drawing> </DrawingBrush> </Rectangle.Fill> </Rectangle> </Window>