public ActionResult Create(IFormCollection currency)
        {
            decimal.TryParse(Request.Form["PLN"].First(), out var zl);
            decimal.TryParse(Request.Form["kurs"].First(), out var kurs);

            var currencyRate = new CurrencyRate();

            {
                currencyRate.Kurs = kurs;
                currencyRate.PLN  = zl;
            }

            ViewBag.result     = currencyRate.CalculateCurrency();
            ViewBag.LastAmount = zl;

            return(View("Index", GetTodayCurrencyList()));
        }