public static Vector2d ToCadVector2d(PointN basePt, PointN destPt)
        {
            Point2d point2d  = GIS2CAD.ToCadPoint2d(basePt);
            Point2d point2d2 = GIS2CAD.ToCadPoint2d(destPt);

            return(point2d.GetVectorTo(point2d2));
        }
        private static Entity DrawPolyline(Point[] points, bool closePart)
        {
            var polyline = new Autodesk.AutoCAD.DatabaseServices.Polyline();
            int num      = 0;

            for (int i = 0; i < points.Length; i++)
            {
                Point  point = points[i];
                PointN srcPt = (PointN)point;
                polyline.AddVertexAt(num++, GIS2CAD.ToCadPoint2d(srcPt), 0.0, 0.0, 0.0);
            }
            return(polyline);
        }