protected virtual void OnExposeEvent(object o, Gtk.ExposeEventArgs args)
	{
	
    	Cairo.Context g = Context.CreateDrawable (area.GdkWindow);
 
		// g is a Graphics object               
		g.MoveTo (10,10);
		g.LineTo (100,10);
		g.LineTo (101,100);
		g.LineTo (10,100);
		g.LineTo (10,10);
		g.ClosePath();
		
		g.Color = new Color(1, 0, 0);
    	g.Stroke();

    	((IDisposable) g.Target).Dispose ();                               
    	((IDisposable) g).Dispose ();	
	
	}