AnimeDownloader.MainForm.PopulateSeries C# (CSharp) Method

        private async Task PopulateSeries()
        {
            List<Show> shows = new List<Show>();
            List<Task<Shows>> tasks = new List<Task<Shows>>();
            foreach (string s in DownloadPluginHandler.Instance.AvailableAuthorizations)
            {
                tasks.Add(DownloadPluginHandler.Instance.Shows(s));
            }
            if (tasks.Count > 0)
            {
                SetBusy(objShows, true);
                await Task.WhenAll(tasks);
                foreach (Task<Shows> t in tasks)
                {
                    if (t.Result.Status == ResponseStatus.Ok)
                        shows.AddRange(t.Result.Items);
                }
                objShows.BeginUpdate();
                objShows.SetObjects(shows);
                objShows.BuildGroups(colShowType, SortOrder.Ascending);
                objShows.BuildList(true);
                objShows.EndUpdate();
                SetBusy(objShows, false);
            }
        }
        private int _lastshowindex = -1;