public void Selete() { selects = new Selects(); Console.WriteLine("# SeleteMenu #"); Console.WriteLine("Select number to function:\n 1.Select one student 2.Select All student " + "3.Select one class'students 4.Select one class 5.Select All class: " + "\n" + " OR Other Number to MainMenu"); int num = int.Parse(Console.ReadLine()); switch (num) { case 1: Console.WriteLine("Please enter the student's id:"); int ssid = int.Parse(Console.ReadLine()); selects.GetStudent(ssid); break; case 2: selects.GetALLStudent(); break; case 3: Console.WriteLine("Please enter the class's id:"); int cid1 = int.Parse(Console.ReadLine()); selects.GetClassAllStudents(cid1); break; case 4: Console.WriteLine("Please enter the class's id:"); int cid2 = int.Parse(Console.ReadLine()); selects.GetClass(cid2); break; case 5: selects.GetAllClass(); break; default: break; } }