static void Main(string[] args)
        {
            Box    Box1 = new Box();              // Declare Box1 of type Box
            Box    Box2 = new Box(6.0, 5.4, 4.4); // Declare Box2 of type Box
            Box    Box3 = new Box(7.5, 2.2, 4.4, "red");
            double volume;

            // box 1 specification
            Box1.setLength(6.0);
            Box1.setBreadth(7.0);
            Box1.setHeight(5.0);

            //// box 2 specification
            //Box2.setLength(12.0);
            //Box2.setBreadth(13.0);
            //Box2.setHeight(10.0);

            // volume of box 1
            volume = Box1.getVolume();
            Console.WriteLine("Volume of Box1 : {0}", volume);

            // volume of box 2
            volume = Box2.getVolume();
            Console.WriteLine("Volume of Box2 : {0}", volume);

            // volume of box 3
            volume = Box3.getVolume();
            Console.WriteLine("Volume of Box3 : {0}", volume);

            // Box 4
            Box Box4 = new Box(10, 20, 30);

            Console.WriteLine("Volume of Box4: {0}", Box4.getVolume());

            Console.ReadKey();
        }