private static void DrawShapeOnDoc(this TriangleCanvasShape tcs, Document doc)
        {
            var shp = doc.Shapes.AddPolyline(tcs.CreatePolyLine());

            shp.Fill.BackColor.SchemeColor = 2;
        }
        private static void DrawShapeOnCanvas(this TriangleCanvasShape tcs, MWord.CanvasShapes canvasItems)
        {
            var shp = canvasItems.AddPolyline(tcs.CreatePolyLine());

            shp.Fill.BackColor.SchemeColor = 2;
        }