public ActionResult Create(User user)
        {
            //if (ModelState.IsValid)
            //{
                db.Users.Add(user);
                db.SaveChanges();
                //return RedirectToAction("Index");
            //}

            return View(user);
        }
 public ActionResult Edit(User user)
 {
     if (ModelState.IsValid)
     {
         db.Entry(user).State = EntityState.Modified;
         db.SaveChanges();
         return RedirectToAction("Index");
     }
     return View(user);
 }