public async virtual Task <FileInfo> DownloadFileTaskAsync(string url, string fileName = "")
{
var ticker = _setting.GetTickerFromUrl(url);
fileName = fileName == string.Empty ? _setting.GetFileName(ticker.TrimStart(new char[] { '^' })) : fileName;
var request = new HttpRequestMessage(HttpMethod.Get, url);
var contentStream = await(await _httpClient.Value.SendAsync(request)).Content.ReadAsStreamAsync();
using (var fileStream = new FileStream(fileName, FileMode.Create, FileAccess.Write, FileShare.None, 4096, true))
{
await contentStream.CopyToAsync(fileStream);
}
return(new FileInfo(fileName));
}