public ActionResult Create(Track track)
        {
            if (ModelState.IsValid)
            {
                _db.Music.Add(track);
                _db.SaveChanges();
                return RedirectToAction("Index");
            }

            return View(track);
        }
 public ActionResult Edit(Track track)
 {
     if (ModelState.IsValid)
     {
         _db.Entry(track).State = EntityState.Modified;
         _db.SaveChanges();
         return RedirectToAction("Index");
     }
     return View(track);
 }