static void Main(string[] args) { Customer customer = new Customer(); customer.Id = 1; customer.Name = "Harry"; customer.Surname = "Potter"; customer.Address = "Hogwarts School of Witchcraft and Wizardry"; customer.Birthday = "31.07.1980"; CustomerManager cmanager = new CustomerManager(); cmanager.Create(customer); Console.WriteLine("create method checked\n=============================="); cmanager.ReadInfo(customer); Console.WriteLine("read method checked\n=============================="); customer.Id = 2; customer.Name = "Ronald"; customer.Surname = "Weasley"; customer.Address = "Shell Cottage"; customer.Birthday = "01.05.1980"; cmanager.Update(customer); Console.WriteLine("update method checked\n=============================="); cmanager.Delete(customer); Console.WriteLine("delete method checked\n=============================="); }