internal void Start() { var pets = new PetController(); var books = new BookController(); var loop = true; while (loop) { UI.PrintStartMenu(); var input = Console.ReadKey(true).Key; switch (input) { case ConsoleKey.D1: books.CallBookMenu(); break; case ConsoleKey.D2: pets.CallPetMenu(); break; case ConsoleKey.D3: loop = false; break; } } }