Polyline pl = new Polyline ();



			//pl.Points = final_points.ToArray ();
		pl.Points = new System.Windows.Point[] { new Point (0, 0), new Point (0,200), new Point (200,200), new Point(200, 0), new Point(0,0) };
		

			pl.Stroke = new SolidColorBrush (Color.FromRgb (70, 70, 70));

			pl.StrokeThickness = 7;

			pl.StrokeLineJoin = PenLineJoin.Round;

			c.Children.Add (pl);