public JsonResult GetClassScheduleByDepartment(int departmentId)
        {
            var courses = courseManager.GetCourseByDepartmentId(departmentId);

            List <object> clsSches = new List <object>();

            foreach (var course in courses)
            {
                var scheduleInfo = classRoomManager.GetAllClassSchedulesByDeparmentId(departmentId, course.Id);
                if (scheduleInfo == "")
                {
                    scheduleInfo = "Not sheduled yet";
                }


                var clsSch = new
                {
                    CourseCode   = course.Code,
                    CourseName   = course.Name,
                    ScheduleInfo = scheduleInfo
                };
                clsSches.Add(clsSch);
            }
            return(Json(clsSches, JsonRequestBehavior.AllowGet));
        }