public ActionResult Create(Performance performance)
        {
            if (ModelState.IsValid)
            {
                db.Performances.Add(performance);
                db.SaveChanges();
                return RedirectToAction("Index");
            }

            ViewBag.ProductionId = new SelectList(db.Productions, "ProductionId", "Title", performance.ProductionId);
            return View(performance);
        }
 public ActionResult Edit(Performance performance)
 {
     if (ModelState.IsValid)
     {
         db.Entry(performance).State = EntityState.Modified;
         db.SaveChanges();
         return RedirectToAction("Index");
     }
     ViewBag.ProductionId = new SelectList(db.Productions, "ProductionId", "Title", performance.ProductionId);
     return View(performance);
 }