<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="100" Height="100" Stroke="Black" StrokeThickness="1"> <Rectangle.Fill> <DrawingBrush> <DrawingBrush.Drawing> <GeometryDrawing Brush="MediumBlue"> <GeometryDrawing.Geometry> <GeometryGroup> <EllipseGeometry RadiusX="0.2" RadiusY="0.45" Center="0.5,0.5" /> <EllipseGeometry RadiusX="0.45" RadiusY="0.2" Center="0.5,0.5" /> </GeometryGroup> </GeometryDrawing.Geometry> <GeometryDrawing.Pen> <Pen Thickness="0.1" Brush="Black" /> </GeometryDrawing.Pen> </GeometryDrawing> </DrawingBrush.Drawing> </DrawingBrush> </Rectangle.Fill> </Rectangle> </Window>