public static void MenuQuanLiBoPhan() { int chon; do { Console.WriteLine("\t\t\t |===============================Quan Li Bo Phan===============================|\n"); Console.WriteLine("\t\t\t | 0. Quay Lai |\n"); Console.WriteLine("\t\t\t | 1. Danh Sach Bo Phan |\n"); Console.WriteLine("\t\t\t | 2. Thoat |\n"); Console.WriteLine("\t\t\t |===================================CHOOSE====================================|\n"); Console.WriteLine("Ban Chon: "); chon = int.Parse(Console.ReadLine()); try { switch (chon) { case 0: QuanLiQuan.MenuQuanLiQuanCaPhe(); break; case 1: QuanLiBoPhan.HienThi(); break; case 2: Environment.Exit(0); break; default: Console.WriteLine("Vui Long Nhap Lai"); break; } } catch (System.FormatException) { Console.WriteLine("Vui Long Nhap Chu So"); } }while(chon != 0 || chon != 3); }