static void OrderCoffee() { while (true) { Console.WriteLine("1. Select Size"); Console.WriteLine("2. Order Cream"); Console.WriteLine("3. Order Sugar"); Console.WriteLine("4. Cancel Cup"); Console.WriteLine("5. Complete Order"); Console.Write(">>"); string input = Console.ReadLine(); switch (input) { case "1": SelectSize(); break; case "2": OrderCream(); break; case "3": OrderSugar(); break; case "4": _coffeeService.CancelCurrentCup(); return; case "5": _coffeeService.CompleteCup(); return; } } }