static void Main(string[] args) { Customer customer0 = new Customer(); customer0.CustomerId = 1; customer0.CustomerName = "rahmi"; customer0.CustomerLastName = "koç"; Customer customer1 = new Customer(); customer1.CustomerId = 2; customer1.CustomerName = "ismail"; customer1.CustomerLastName = "koç"; Customer[] customers = { customer0, customer1 }; foreach (var Customers in customers) { Console.WriteLine(Customers.CustomerName + " " + Customers.CustomerLastName + " / " + Customers.CustomerId); } ; CustomerManager customerManager = new CustomerManager(); customerManager.add(customer0); customerManager.add(customer1); customerManager.delete(customer0); customerManager.delete(customer1); customerManager.list(customer1); customerManager.list(customer0); }