public void InsertMenu() { bool ContinueOrExit = true; do { Console.WriteLine("If u want to insert a student to the private school data base write 1 in console"); Console.WriteLine("If u want to insert a trainer to the private school data base write 2 in console"); Console.WriteLine("If u want to insert a course to the private school data base write 3 in console"); Console.WriteLine("If u want to insert a assignment to the private school data base write 4 in console"); Console.WriteLine("If u want to relate student with course to the private school data base write 5 in console"); Console.WriteLine("If u want to relate trainer with course to the private school data base write 6 in console"); Console.WriteLine("If u want to relate assignment with course to the private school data base write 7 in console"); Console.WriteLine("\nIf u want to return to Main Menu write 0 from keyboard\n"); string userInput = Console.ReadLine(); ContinueOrExit = CheckToContinueOrExit(userInput); switch (userInput) { case "1": Console.Clear(); studentService.Create(); break; case "2": Console.Clear(); trainerService.Create(); break; case "3": Console.Clear(); courseService.Create(); break; case "4": Console.Clear(); assignmentService.Create(); break; case "5": Console.Clear(); watchService.Create(); break; case "6": Console.Clear(); teachService.Create(); break; case "7": Console.Clear(); assignService.Create(); break; case "0": Console.Clear(); break; default: Console.Clear(); InsertMenu(); break; } } while (ContinueOrExit); }