public override async Task Refresh() {
            var client = CreateClient();
            var torrents = await client.GetListAsync();

            var completeds = torrents.Result.Torrents.Where(t => t.Downloaded > 0 && t.Remaining == 0);
            foreach (var completed in completeds) {
                var hash = completed.Hash;
                var files = (await client.GetFilesAsync(hash)).Result.Files;
                var fileNames = files.SelectMany(fc => fc.Value.Select(f => f.Name));
                var sourcePath = completed.Path;

                var args = new DownloadCompletedEventArgs(hash, sourcePath, fileNames);
                OnDownloadCompleted(args);
                if (args.Found && Settings.DeleteCompletedTorrents) {
                    await client.DeleteTorrentAsync(hash);
                    await Task.Delay(1618);
                    if (args.Moved)
                        Helper.DeleteDirectory(sourcePath);
                }
            }
        }
        public override Task Refresh() {
            return Task.Run(() => {
                var client = CreateClient();
                var torrents = client.GetTorrents(new[] {Fields.ID, Fields.HASH_STRING, Fields.PERCENT_DONE, Fields.DOWNLOAD_DIR, Fields.FILES});

                var completeds = torrents.Torrents.Where(t => t.PercentDone >= 1);
                foreach (var completedTmp in completeds) {
                    var completed = completedTmp;
                    var sourcePath = completed.DownloadDir;

                    var files = completed.Files.Select(f => Path.GetFileName(Path.Combine(completed.DownloadDir, f.Name)));
                    var args = new DownloadCompletedEventArgs(completed.HashString, sourcePath, files);
                    OnDownloadCompleted(args);

                    if (args.Found && Settings.DeleteCompletedTorrents) {
                        client.RemoveTorrents(new[] { completed.ID }, args.Moved);
                        if (args.Moved)
                            Helper.DeleteDirectory(sourcePath);
                    }
                }
            });
        }