public void Contains()
        {
            Rect rec = new Rect(new Point(), new Point(3, 5));

            //Assert.AreEquals point within the Rect
            Assert.AreEqual(rec.contains(new Point(1, 1)), true);
            //Assert.AreEquals point outside of the Rect
            Assert.AreEqual(rec.contains(new Point(10, 10)), false);
        }
        static void Main(string[] args)
        {
            Rectangle r1;

            r1 = new Rectangle(1, 1, 1, 1);
            r1.show();
            r1.lengths(2);
            r1.widths(2);
            r1.postion(2, 2);
            r1.show();
            r1.area();
            r1.perimeter();
            r1.contains();
            Console.WriteLine(r1.ToString());
        }