public static IVisio.Shape DrawLine(this IVisio.Page page, Drawing.Point p1, Drawing.Point p2)
        {
            var surface = new Drawing.DrawingSurface(page);
            var shape   = surface.DrawLine(p1.X, p1.Y, p2.X, p2.Y);

            return(shape);
        }
        public static IVisio.Shape DrawLine(this IVisio.Shape shape, Drawing.Point p1, Drawing.Point p2)
        {
            var surface = new Drawing.DrawingSurface(shape);
            var s       = surface.DrawLine(p1, p2);

            return(s);
        }
 public static IVisio.Shape DrawLine(this IVisio.Shape shape, Drawing.Point p1, Drawing.Point p2)
 {
     var surface = new Drawing.DrawingSurface(shape);
     var s = surface.DrawLine(p1, p2);
     return s;
 }