SuperMap.WindowsPhone.Core.GeoRegion.GetBounds C# (CSharp) Method

        public Rectangle2D GetBounds()
        {
            Point2DCollection point2Ds = new Point2DCollection();
            Rectangle2D bounds = this.Bounds;

            int[] parts = new int[this.Parts.Count];

            int point2DCount = 0;
            foreach (var item in this.Parts)
            {
                foreach (var item1 in item)
                {
                    point2Ds.Add(item1);
                }
                parts[point2DCount] = item.Count;
                point2DCount++;
            }

            if (point2Ds == null || point2Ds.Count == 0)
            {
                //throw new IllegalArgumentException(resource.getMessage("Geometry.getBounds.nopoints")); // %
                return Rectangle2D.Empty;
            }
            else
            {
                double left, bottom, right, top;
                left = point2Ds[0].X;
                bottom = point2Ds[0].Y;
                right = left;
                top = bottom;
                int iLength = point2Ds.Count;
                for (int i = 1; i < iLength; i++)
                {
                    if (point2Ds[i].X < left)
                    {
                        left = point2Ds[i].X;
                    }
                    if (point2Ds[i].Y < bottom)
                    {
                        bottom = point2Ds[i].Y;
                    }
                    if (point2Ds[i].X > right)
                    {
                        right = point2Ds[i].X;
                    }
                    if (point2Ds[i].Y > top)
                    {
                        top = point2Ds[i].Y;
                    }
                }
                return new Rectangle2D(left, bottom, right, top);
            }
        }
    }