public static void DownloadStringFromGoogleCompleted(object sender, DownloadStringCompletedEventArgs e)
{
if (e.Error == null)
{
instance.jsonSendeplan = e.Result;
instance.UpdateLabels();
instance.lastDownload = DateTime.Now;
instance.downloadedScheduleDataOnce = true;
}
else
{
instance.SwitchApi();
}
}
