public static void MenuScreen() { Console.Clear(); Console.WriteLine("Menu Screen"); Console.WriteLine(); Console.WriteLine("1. Register new Car Rent"); Console.WriteLine("2. Update Car Rent"); Console.WriteLine("3. List Rents"); Console.WriteLine("4. List Available Cars"); Console.WriteLine("5. Register new Customer"); Console.WriteLine("6. Update Customer"); Console.WriteLine("7. List Customers"); Console.WriteLine("8. Gold/Silver Customers"); Console.WriteLine("9. Most Recent Rented Cars"); Console.WriteLine("10. Most Rented Cars"); Console.WriteLine("11. Less rented Cars"); Console.WriteLine("12. Quit"); Console.WriteLine(); Console.WriteLine("Please, type the number associated with the option you want and the press ENTER"); //Application.EnableVisualStyles(); //Application.SetCompatibleTextRenderingDefault(false); //Application.Run(new MenuScreen()); int number; //ConsoleKeyInfo cki= Console.ReadKey() try { number = int.Parse(Console.ReadLine()); if (number < 1 || number > 12) { Console.WriteLine("This is not a valid option"); } switch (number) { case 1: Register_New_Rent.RegisterNewCarRent(); break; case 2: Update_Rent.UpdateCarRent(); break; case 3: List_Rents.ListRents(); break; case 4: List_Available_Cars.ListAvailableCars(); break; case 5: Register_New_Customer.RegisterNewCustomer(); break; case 6: Update_Customer.UpdateCustomer(); break; case 7: List_Customers.ListCustomers(); break; case 8: Golden_Silver_Customers.GoldSilverCostumers(); break; case 9: Most_Recent_Rented_Cars.MostRecentRentedCars(); break; case 10: Most_Less_Rented_Cars.MostRentedCars(); break; case 11: Most_Less_Rented_Cars.LessRentedCars(); break; case 12: Environment.Exit(0); break; } } catch (FormatException) { Console.WriteLine("This is not a valid option"); } }