public void Menu() { HospitalController hospitalController = new HospitalController(); Console.WriteLine("************ Welcome To Hospital Management Application **************!"); Console.WriteLine(" 1. Hospital Admin Site "); Console.WriteLine(" 2. View Departments & Doctors "); Console.WriteLine(" 3. Doctor Handle "); Console.WriteLine(" 4. Exit "); Console.Write("Enter Choice : "); int choice = Convert.ToInt32(Console.ReadLine()); switch (choice) { case 1: hospitalController.HospitalAdmin(); break; case 2: hospitalController.ViewDepartment(); break; case 3: hospitalController.DoctorHandle(); break; case 4: System.Environment.Exit(0); break; default: Console.WriteLine("********* Invalid Choice Enter !!!!! "); break; } }