public ActionResult Index()
        {
            //  return View();
            query_student  obj = new query_student();
            List <Student> stu = obj.getData();

            return(View(stu));
        }
        public ActionResult Contact()
        {
            //   ViewBag.Message = "Your contact page.";

            //  return View();


            query_student s1 = new query_student();

            return(View(s1));
        }
        public ActionResult About()
        {
            // ViewBag.Message = "Your application description page.";

            // return View();


            query_student  s  = new query_student();
            List <Student> s1 = s.getstudentwithlowestandhighestmarks();

            return(View(s1));
        }