static void Main(string[] args)
        {
            Console.BackgroundColor = ConsoleColor.Blue;
            Console.Clear();
            Console.ForegroundColor = ConsoleColor.White;

            Car.numberAvailable     = 0;
            Car.valueOfCurrentStock = 0;

            List <Car> carlot = new List <Car>();


            Car car1 = new Car("Ford", "Mustang", "1111", 2000, 30000, false, carlot);
            Car car2 = new Car("BMW", "Continental", "1222", 2005, 45000, false, carlot);
            Car car3 = new Car("Jaguar", "r-models", "1333", 2009, 60000, false, carlot);


            string selection = "";


            do
            {
                switch (selection)
                {
                case "a":
                    Console.Clear();
                    Car car4 = new Car(false, carlot);
                    Console.WriteLine("Press any key to continue...");
                    selection = Console.ReadLine();
                    break;


                case "d":
                    Console.Clear();
                    Car.displayCars(carlot);
                    Console.WriteLine("Hit Tab to continue...");
                    selection = Console.ReadLine();

                    break;


                case "t":

                    Console.Clear();
                    Car.totalValue(carlot);
                    Console.WriteLine("Hit Tab to continue...");
                    selection = Console.ReadLine();

                    break;

                case "s":

                    Console.Clear();
                    Console.WriteLine("What make do you wish to sell");
                    String make = Console.ReadLine();
                    Car.sellCar(carlot, make);
                    selection = Console.ReadLine();
                    break;

                default:
                    Console.Clear();
                    Console.WriteLine("Would you like to enter a car press <a>");
                    Console.WriteLine("Would you like view carlot press <d>");
                    Console.WriteLine("Would you like to view the total value <t>");
                    Console.WriteLine("To sell a car select <s>");
                    Console.WriteLine("Press <e> to exit");
                    selection = Console.ReadLine();
                    continue;
                }
            } while (selection != "e");
        }