EllipseGeometry

   
    

<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">
          <Path Stroke="Black" StrokeThickness="1" Fill="#CCCCFF">
            <Path.Data>
              <EllipseGeometry Center="40,70" RadiusX="30" RadiusY="30" />
            </Path.Data>
          </Path>

</Window>