protected Path DrawRectangle(double x, double y, double width, double height, SolidColorBrush fillColor, Brush strokeColor)
        {            
            Path p = new Path();
            GeometryGroup geomGroup = new GeometryGroup();
            RectangleGeometry rectGeom = CreateRectangleGeometry(x, y, width, height);
            geomGroup.Children.Add(rectGeom);
            p.Data = geomGroup;
            p.Fill = fillColor;
            p.Stroke = strokeColor;
            p.StrokeThickness = 1;
            canvas.Children.Add(p);
            return p;
        }
		
protected RectangleGeometry CreateRectangleGeometry(double x, double y, double width, double height)
        {
            RectangleGeometry rectGeom = new RectangleGeometry();
            Rect rct = new Rect();
            rct.X = x;
            rct.Y = y;
            rct.Width = width;
            rct.Height = height;
            rectGeom.Rect = rct;
            return rectGeom;           
        }