public JsonResult GetEnrollCourseByStdId(int studentIdforCourse)
        {
            var aViewEnrollCourses     = aEnrollCourseManager.GetAllEnrolledCourse();
            var aViewEnrollCoursesList = aViewEnrollCourses.Where(a => a.StudentId == studentIdforCourse).ToList();

            return(Json(aViewEnrollCoursesList, JsonRequestBehavior.AllowGet));
        }