private static void Main(string[] args)
{
var service = new ExchangeRateService(new FixerApiService(), new CurrencyExchangeRateRepository());
service.DownloadExchangeRateDataAsync().GetAwaiter().GetResult();
var result = service.GetExchangeRateAsync(Currency.EUR, new DateRange {
StartTime = new DateTime(2018, 7, 11)
}).GetAwaiter().GetResult();
Console.WriteLine(JsonConvert.SerializeObject(result));
Console.ReadLine();
}