public async Task <DownloadFileInfo> GetLastDownloadFileInfo()
{
Uri methodUri = new Uri("http://fias.nalog.ru/WebServices/Public/GetLastDownloadFileInfo");
string contentDownloadFileInfo = await _apiHelper.GetContentAsStringAsync(methodUri);
DownloadFileInfo lastFileInfo = JsonConvert.DeserializeObject <DownloadFileInfo>(contentDownloadFileInfo);
return(lastFileInfo);
}