public ActionResult CourseAssign(CourseAssignTeacher assigncourse)
        {
            string msg = aCourseAssignManager.AssignCourseToTeacher(assigncourse);

            ModelState.Clear();
            ViewBag.Message = msg;
            List <Department> departments = aDepartmentManager.GetAllDepartmentsInfo();

            ViewBag.Departments = departments;
            return(View());
        }