static void Main(string[] args) { Address add1 = new Address { Number = "1", Street = "First Street", Town = "Glasgow", Postcode = "G99 9GL" }; Customer cust1 = new Customer("Schumacher", "Michael", 0.1m, add1); Product prod1 = new Product("widget","P1", 10.99m); Product prod2 = new Product("gadget", "P2", 8.99m); Supplier supp1 = new Supplier("S1", "Acme", "Timo Glock"); prod1.AddSupplier(supp1, 4.99m); prod1.AddSupplier(supp1, 2.99m); Order ord1 = new Order("O1", DateTime.Now, cust1); ord1.AddLine(3, prod1); ord1.AddLine(2, prod2); Invoice inv1 = ord1.RaiseInvoice(); Console.WriteLine("Order price: {0:C}", ord1.CalcPrice()); Console.ReadLine(); }