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

            return View(user);
        }
 /// <summary>
 /// Add a new user
 /// </summary>
 /// <param name="newUser"></param>
 public void Add(User newUser)
 {
     newUser.Password = HashPassword(newUser.Password);
     users.Add(newUser.Username, newUser);
 }