public ActionResult AddNewStudentClass(int?id)
        {
            if (id != null)
            {
                ViewBag.AlreadyExists = false;

                StudentClass _item = StudentClass.GetById(id.Value);
                return(View(_item));
            }
            else
            {
                ViewBag.AlreadyExists = false;
                StudentClass _item = new StudentClass();
                return(View(_item));
            }
        }