public ActionResult Create(Artist artist)
        {
            if (ModelState.IsValid)
            {
                db.Artists.Add(artist);
                db.SaveChanges();
                return RedirectToAction("Index");
            }

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