static void Menu(Order cart)
        {
            var exit = false;

            do
            {
                Starter.PrintMenu();

                int select;

                int.TryParse(Console.ReadLine(), out select);

                switch (select)
                {
                case 1:
                    cart.CreatePizza("L", "Stuffed", new List <string> {
                        "cheese"
                    });
                    System.Console.WriteLine("added Cheese");
                    break;

                case 2:
                    cart.CreatePizza("L", "Stuffed", new List <string> {
                        "pepperoni"
                    });
                    System.Console.WriteLine("added Pepperoni");
                    break;

                case 3:
                    cart.CreatePizza("L", "Stuffed", new List <string> {
                        "meat lovers"
                    });
                    System.Console.WriteLine("added Meatlovers");
                    break;

                case 4:
                    cart.CreatePizza("L", "Stuffed", new List <string> {
                        "custom"
                    });
                    System.Console.WriteLine("added Custom");
                    break;

                case 5:
                    DisplayCart(cart);
                    break;

                case 6:
                    var fmw = new FileManager();
                    fmw.Write(cart);
                    System.Console.WriteLine("thank you, goodbye!");
                    exit = true;
                    break;

                case 7:
                    var fmr = new FileManager();
                    DisplayCart(fmr.Read());
                    break;
                }

                System.Console.WriteLine();
            } while (!exit);
        }