public static void Display(BoxCollection bxList)
        {
            /*
             * Console.WriteLine("\nHeight\tLength\tWidth\tHash Code");
             * foreach (Box bx in bxList)
             * {
             *  Console.WriteLine("{0}\t{1}\t{2}\t{3}",
             *      bx.Height.ToString(), bx.Length.ToString(),
             *      bx.Width.ToString(), bx.GetHashCode().ToString());
             * }
             */

            // Results by manipulating the enumerator directly:
            IEnumerator enumerator = bxList.GetEnumerator();

            Console.WriteLine("\nHeight\tLength\tWidth\tHash Code");
            while (enumerator.MoveNext())
            {
                Box b = (Box)enumerator.Current;
                Console.WriteLine("{0}\t{1}\t{2}\t{3}",
                                  b.Height.ToString(), b.Length.ToString(),
                                  b.Width.ToString(), b.GetHashCode().ToString());
            }

            Console.WriteLine();
        }
        public static void Run()
        {
            PrintTitle("GENERIC INTERFACES - ICOLLECTION(T)");

            BoxCollection bxList = new BoxCollection();

            bxList.Add(new Box(10, 4, 6));
            bxList.Add(new Box(4, 6, 10));
            bxList.Add(new Box(6, 10, 4));
            bxList.Add(new Box(12, 8, 10));

            // Same dimensions. Cannot be added:
            bxList.Add(new Box(10, 4, 6));

            // Test the Remove method.
            Display(bxList);
            Console.WriteLine("Removing 6x10x4");
            bxList.Remove(new Box(6, 10, 4));
            Display(bxList);

            // Test the Contains method.
            Box BoxCheck = new Box(8, 12, 10);

            Console.WriteLine($"Contains {BoxCheck.Height.ToString()}x{BoxCheck.Length.ToString()}x{BoxCheck.Width.ToString()} by volume: {bxList.Contains(BoxCheck).ToString()}");

            // Test the Contains method overload with a specified equality comparer (compares volume).
            Console.WriteLine($"Contains {BoxCheck.Height.ToString()}x{BoxCheck.Length.ToString()}x{BoxCheck.Width.ToString()} by volume: {bxList.Contains(BoxCheck, new BoxVolumeEqualityComparer()).ToString()}");
        }