private static void DisplayAccountDetails()
        {
            ManageAccount         manageAccount   = new ManageAccount();
            List <AccountDetails> _accountDetails = manageAccount.getAcountDetails();

            foreach (AccountDetails ad in _accountDetails)
            {
                Console.WriteLine("Account details for Account #" + ad.AccountNumber + "\n" +
                                  "Name :" + ad.Name + "\n" +
                                  "Amount:" + ad.Amount + "\n");
            }
        }