public IActionResult Create(PrePaidCard card)
 {
     if (card != null)
     {
         Random rnd = new Random();
         card.code = rnd.Next(0, 9999);
         cards.Add(card);
     }
     return(RedirectToAction("Index"));
 }
        public IActionResult Edit(long?id)
        {
            PrePaidCard cardView = new PrePaidCard();

            foreach (PrePaidCard card in cards)
            {
                if (card.id == id)
                {
                    cardView = card;
                }
            }
            return(View(cardView));
        }
 public IActionResult Edit(long id, PrePaidCard card)
 {
     foreach (PrePaidCard newCard in cards)
     {
         if (newCard.id == id)
         {
             newCard.name   = card.name;
             newCard.code   = card.code;
             newCard.entity = card.entity;
             newCard.credit = card.credit;
         }
     }
     return(RedirectToAction("Index"));
 }