public IActionResult Get(Int32 PageNumber = 1)
        {
            Int32                  pageSize          = 5;
            PageViewModel          viewModel         = new PageViewModel(Valutes.GetAll().Count(), PageNumber, 5);
            IEnumerable <Currency> currenciesPerPage = Valutes.GetAll().Skip((PageNumber - 1) * pageSize).Take(pageSize);
            IndexViewModel         indexViewModel    = new IndexViewModel(currenciesPerPage, viewModel);

            return(View(indexViewModel));
        }
        public IActionResult GetById(String ID)
        {
            Currency valute = Valutes.GetAll().FirstOrDefault(x => x.ID == ID);

            if (valute == null)
            {
                return(NotFound());
            }
            return(View(valute));
        }