public ActionResult del()
        {
            StudentService ss = new StudentService();
            ss.Delete();

            return Content("");
        }
        public ActionResult UpdateStudent()
        {
            Student s = new Student();
            s.Id = 89;
            s.Name = "XXXXXXX";

            StudentService ss = new StudentService();
            ss.Update(s);

            return Content("");
        }
 private void add(string name,int age)
 {
     Student s = new Student();
     //s.Id = 1;
     //s.CollectionName = "Student";
     s.Name = name;
     s.Age = age;
     s.Score = 100;
     StudentService ss = new StudentService();
     ss.Add(s);
 }
        public ActionResult Get()
        {
            //Student s = new Student();
            //s.Id = "56001dc142ce06616c6d45db";

            StudentService ss = new StudentService();
            var stu = ss.GetById(89);

            //var l = ss.Search();

            return Content("");
        }