public void ChangeContact() { Console.WriteLine("Podaj numer użytkownika :"); string stringId = Console.ReadLine(); Console.WriteLine("Nowy numer telefonu :"); string newPhone = Console.ReadLine(); try { int id = Int32.Parse(stringId); var ownerController = new OwnerController(); ownerController.ChangePhoneNumber(id, newPhone); } catch (FormatException e) { Console.WriteLine(e.Message); } }