// Иначе вернуть -1
        public static int IndexOfInnerRectangle(Rectangle r1, Rectangle r2)
        {

                if (AreIntersected(r1, r2))
                    if ((r1.Left >= r2.Left) && (r1.Top >= r2.Top) && (r1.Bottom <= r2.Bottom) && (r1.Right <= r2.Right))
                        return 0;
                    else if ((r2.Left >= r1.Left) && (r2.Top >= r1.Top) && (r2.Bottom <= r1.Bottom) && (r2.Right <= r1.Right))
                        return 1;
                return -1;

        }
    }