public ActionResult Create(Performer performer)
        {
            if (ModelState.IsValid)
            {
                db.Performers.Add(performer);
                db.SaveChanges();
                return RedirectToAction("Index");
            }

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