public List <ExchangeRate> DownloadNewExchangeRates()
{
string[] splitedResult = httpClient.GetDailyCurrencyRate().Split(new[] { "\r\n", "\r", "\n" }, StringSplitOptions.None);
Dictionary <string, ExchangeRate> exchangeRates = ParseResult(splitedResult);
exchangeRateRepository.Post(exchangeRates);
return(exchangeRates.Values.ToList());
}