public ActionResult AddMajor(Models.Majors major)
 {
     try
     {
         tdb.Majors.Add(major);
         tdb.SaveChanges();
         return(Content("ok"));
     }
     catch
     {
         return(Content("err"));
     }
 }
        public ActionResult EditMajor(Models.Majors m)
        {
            try
            {
                var mm = tdb.Majors.Single(t => t.ID == m.ID);
                mm.Name = m.Name;

                tdb.SaveChanges();
                return(Content("ok"));
            }
            catch
            {
                return(Content("err"));
            }
        }