public ActionResult Index()
        {
            ViewBag.Departments       = homeManager.GetTotalDepartments();
            ViewBag.Teachers          = homeManager.GetTotalTeachers();
            ViewBag.StudentsRegisterd = homeManager.GetRegisteredStudent();
            ViewBag.Classrooms        = homeManager.GetTotalClassrooms();
            ViewBag.Date = DateTime.Now.ToString();

            ViewBag.StudentByYear = homeManager.GetStudentByYear();
            ViewBag.TeachersInfo  = homeManager.GetAllTeacherInfo();
            ViewBag.StudentInfo   = homeManager.GetAllStudentInfo();

            return(View());
        }