private void DownloaderUC_DownloadCanceled(object sender, DownloadCanceledEventArgs e)
 {
     validationLabel.ForeColor = Color.Red;
     if (e.FileName != null)
     {
         validationLabel.Text = "Download canceled: " + e.FileName;
     }
     else
     {
         validationLabel.Text = "Selected downloads canceled";
     }
 }
 protected void OnDownloadCanceled(DownloadCanceledEventArgs e)
 {
     DownloadCanceled?.Invoke(this, e);
     DownloadsUpdated?.Invoke(this);
 }