public ActionResult Create(Level level)
        {
            if (ModelState.IsValid)
            {
                db.Levels.Add(level);
                db.SaveChanges();

                return this.RestoreReferrer() ?? RedirectToAction("Index");
            }

            return View(level);
        }
        public ActionResult Edit(Level level)
        {
            if (ModelState.IsValid)
            {
                db.Entry(level).State = EntityState.Modified;
                db.SaveChanges();

                return this.RestoreReferrer() ?? RedirectToAction("Index");
            }
            return View(level);
        }