static void Main(string[] args) { Item item = new Item(); ItemManagement itemManagement = new ItemManagement(); do { item.display(); Console.WriteLine("Enter your choice:"); string yourChoice = Console.ReadLine(); switch (yourChoice) { case "1": itemManagement.addItem(); break; case "2": itemManagement.update(); break; case "3": itemManagement.delete(); break; case "4": //search item by code itemManagement.search(); break; case "5": //display item itemManagement.showAll(); break; case "6": //quit System.Environment.Exit(1); Console.WriteLine("GoodBye!!!!"); break; } } while (true); }