<Canvas Height="256" HorizontalAlignment="Left" Margin="80,45,0,0" Name="canvas1" VerticalAlignment="Top" Width="401">
            <Ellipse Canvas.Left="120" Canvas.Top="54" Height="36" Name="ellipse1" Stroke="Black" Width="77" MouseUp="ellipse1_MouseUp" MouseMove="ellipse1_MouseMove" />
        </Canvas>


  private void ellipse1_MouseUp(object sender, MouseButtonEventArgs e)
        {
            Close();
        }