System.Drawing.Region.PlotPath C# (CSharp) Method

        void PlotPath(GraphicsPath path)
        {
            float x1 = 0, y1 = 0, x2 = 0, y2 = 0, x3 = 0, y3 = 0;
            var points = path.PathPoints;
            var types = path.PathTypes;
            int bidx = 0;

            for (int i = 0; i < points.Length; i++){
                var point = points [i];
                var type = (PathPointType) types [i];

                switch (type & PathPointType.PathTypeMask){
                case PathPointType.Start:
                    regionPath.MoveToPoint (point.ToCGPoint ());
                    break;

                case PathPointType.Line:
                    regionPath.AddLineToPoint (point.ToCGPoint ());
                    break;

                case PathPointType.Bezier3:
                    // collect 3 points
                    switch (bidx++){
                        case 0:
                        x1 = point.X;
                        y1 = point.Y;
                        break;
                        case 1:
                        x2 = point.X;
                        y2 = point.Y;
                        break;
                        case 2:
                        x3 = point.X;
                        y3 = point.Y;
                        break;
                    }
                    if (bidx == 3){
                        regionPath.AddCurveToPoint (x1, y1, x2, y2, x3, y3);
                        bidx = 0;
                    }
                    break;
                    default:
                    throw new Exception ("Inconsistent internal state, path type=" + type);
                }
                if ((type & PathPointType.CloseSubpath) != 0)
                    regionPath.CloseSubpath ();
            }
        }