private void btnProgressAndCancellation_Click(object sender, EventArgs e)
 {
     var dlg = new UploadProgressCancelForm(_accessToken);
     dlg.ShowDialog();
 }
        private void btnProgressAndCancellation_Click(object sender, EventArgs e)
        {
            var dlg = new UploadProgressCancelForm(_accessToken);

            dlg.ShowDialog();
        }