static void Main(string[] args)
        {
            //testing client object
            //instantiate one client object
            Client clientInst = new Client();
            //clientInst.ShowClientInfo();

            //testing checking object
            //instantiate one checking object
            Checking checkingInst = new Checking();

            //testing savings object
            //instantiate one savings object
            Savings savingsInst = new Savings();

            string strMenuChoice;
            int    menuChoice;

            //display state
            Console.BackgroundColor = ConsoleColor.DarkBlue;
            Console.Clear();

            do
            {
                //Menu layout
                Console.WriteLine("Please make a selection of 1, 2, 3, 4 or 5 below: ");
                Console.WriteLine();
                Console.WriteLine("1) View Client Information");
                Console.WriteLine("2) View Account Balance");
                Console.WriteLine("3) Deposit Funds");
                Console.WriteLine("4) Withdraw Funds");
                Console.WriteLine("5) Exit");
                Console.WriteLine("\n");

                //Processed menu options
                strMenuChoice = Console.ReadLine();
                menuChoice    = int.Parse(strMenuChoice);

                switch (menuChoice)
                {
                case 1:
                    clientInst.ShowClientInfo();
                    Console.WriteLine("\n");
                    break;

                case 2:
                    Console.WriteLine("Enter C for Checking: ");
                    Console.WriteLine("Enter S for Savings: \n");

                    string balanceOption = Console.ReadLine();
                    if (balanceOption.ToLower() == "c")
                    {
                        checkingInst.showCurrentBalance();
                    }
                    else if (balanceOption.ToLower() == "s")
                    {
                        savingsInst.showCurrentBalance();
                    }
                    Console.WriteLine("\n");
                    break;

                case 3:
                    Console.WriteLine("Enter C for Checking: ");
                    Console.WriteLine("Enter S for Savings: \n");
                    string depositOption = Console.ReadLine();
                    if (depositOption.ToLower() == "c")
                    {
                        Console.WriteLine("Deposit Amount: ");
                        decimal depositAmount = Decimal.Parse(Console.ReadLine());
                        checkingInst.depositFunds(depositAmount);
                        checkingInst.showCurrentBalance();
                    }
                    else if (depositOption.ToLower() == "s")
                    {
                        Console.WriteLine("Deposit Amount: ");
                        decimal depositAmount = Decimal.Parse(Console.ReadLine());
                        savingsInst.depositFunds(depositAmount);
                        savingsInst.showCurrentBalance();
                    }
                    Console.WriteLine("\n");
                    break;

                case 4:
                    Console.WriteLine("Enter C for Checking: ");
                    Console.WriteLine("Enter S for Savings: \n");
                    string withdrawalOption = Console.ReadLine();
                    if (withdrawalOption.ToLower() == "c")
                    {
                        Console.WriteLine("Withdrawal Amount: ");
                        decimal withdrawalAmount = Decimal.Parse(Console.ReadLine());
                        checkingInst.withdrawFunds(withdrawalAmount);
                        checkingInst.showCurrentBalance();
                    }
                    else if (withdrawalOption.ToLower() == "s")
                    {
                        Console.WriteLine("\nWithdrawal Amount: ");
                        decimal withdrawalAmount = Decimal.Parse(Console.ReadLine());
                        savingsInst.withdrawFunds(withdrawalAmount);
                        savingsInst.showCurrentBalance();
                    }
                    Console.WriteLine("\n");
                    break;

                case 5:
                    Console.WriteLine("Exit");
                    Console.WriteLine("\n");
                    break;

                default:
                    Console.WriteLine("I'm sorry, I don't understand that!");
                    Console.WriteLine("\n");
                    break;
                }
            }while (menuChoice != 5);
            System.Environment.Exit(0);
        }