static void Main(string[] args) { Beverage essp = new Espresso(); Console.WriteLine(essp.GetDiscription() + "\t" + essp.cost().ToString()); Beverage houseB = new HouseBlend(); Console.WriteLine(houseB.GetDiscription() + "\t" + houseB.cost().ToString()); essp = new Whip(essp); Console.WriteLine(essp.GetDiscription() + "\t" + essp.cost().ToString()); essp = new SteamMilk(essp); Console.WriteLine(essp.GetDiscription() + "\t" + essp.cost().ToString()); houseB = new Soy(houseB); Console.WriteLine(houseB.GetDiscription() + "\t" + houseB.cost().ToString()); // Create book Book book = new Book("Worley", "Inside ASP.NET", 10); book.Display(); // Create video Video video = new Video("Spielberg", "Jaws", 23, 92); video.Display(); // Make video borrowable, then borrow and display Console.WriteLine("\nMaking video borrowable:"); Borrowable borrowvideo = new Borrowable(video); borrowvideo.BorrowItem("Customer #1"); borrowvideo.BorrowItem("Customer #2"); borrowvideo.BorrowItem("Customer #3"); borrowvideo.Display(); borrowvideo.ReturnItem("Customer #1"); borrowvideo.ReturnItem("Customer #2"); borrowvideo.Display(); // Wait for user Console.ReadKey(); while (true) { } }