public ActionResult Augmenter(int id, decimal?nouveauMontant) { decimal capital = 0; if (nouveauMontant != null) { capital = (decimal)nouveauMontant; } User user = DB.Users.Find(id); ViewBag.Montant = user.Montant; if (user.Montant < nouveauMontant) { DB.AugmenterCapital(user.Id, capital); return(RedirectToAction("Index")); } return(View(user.ToUserView())); }