static void Main()
        {
            byte[] mb = { 1, 2, 3, 4, 5 };
            for (int i = 0; i < mb.Length; i++)
            {
                Console.WriteLine("element {0} - {1}", i, mb [i]);
            }

            string ch = "ABCDEFG";
            char[] chars = ch.ToCharArray();
            for (int i = 0; i < chars.Length; i++)
            {
                Console.WriteLine("element {0} - {1}", i, chars [i]);
            }
        }