async public Task Download(Uri fileUri, Page Card) { ServicePointManager.ServerCertificateValidationCallback += (sender, cert, chain, sslPolicyErrors) => true; using (WebClient cln = new WebClient()) { string filename = "ŚĆŻ"; string partfilename = string.Empty; string type = string.Empty; long Size = 0; try { cln.OpenRead(fileUri); string header_contentDisposition = cln.ResponseHeaders["content-disposition"]; filename = new ContentDisposition(header_contentDisposition).FileName; byte[] bytes = Encoding.Default.GetBytes(filename); filename = Encoding.UTF8.GetString(bytes); partfilename = filename.Substring(0, filename.LastIndexOf('.')); type = filename.Substring(filename.LastIndexOf('.')); } catch (Exception e) { Debug.WriteLine(e); } FileSavePicker picker = new FileSavePicker(); picker.SuggestedFileName = partfilename; picker.FileTypeChoices.Add(type.Substring(1), new List <string>() { type }); picker.SuggestedStartLocation = PickerLocationId.DocumentsLibrary; var file = await picker.PickSaveFileAsync(); var DownloadO = new Download(Card.Dispatcher) { Filename = file.Name, URL = fileUri, FileSize = Size }; FileUpdateStatus status = await CachedFileManager.CompleteUpdatesAsync(file); if (status == FileUpdateStatus.Complete) { BackgroundDownloader downloader = new BackgroundDownloader(); DownloadOperation download = downloader.CreateDownload(DownloadO.URL, file); DObject = DownloadO; Player.Download.DownloadList.Add(DObject); download.StartAsync(); download.RangesDownloaded += Download_RangesDownloaded; } } }