Overlapping Rectangles

   
   

<Canvas xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">

    <Path Fill="Gold" Stroke="Red" StrokeThickness="3">
        <Path.Data>
            <RectangleGeometry Rect="96 96 192 192" />
        </Path.Data>
    </Path>

    <Path Fill="Blue" Stroke="Red" StrokeThickness="3">
        <Path.Data>
            <RectangleGeometry Rect="192 192 192 192" />
        </Path.Data>
    </Path>

    <Path Fill="Red" Stroke="Red" StrokeThickness="3">
        <Path.Data>
            <GeometryGroup>
                <RectangleGeometry Rect="480 96 192 192" />
                <RectangleGeometry Rect="576 192 192 192" />
            </GeometryGroup>
        </Path.Data>
    </Path>

</Canvas>