private void Window_Closing(object sender, System.ComponentModel.CancelEventArgs e)
{
if (!finished)
{
NotificationBox notification = new NotificationBox("Are you sure you want to cancel the download?\nAll progress will be lost.", false);
notification.ShowDialog();
notification.Activate();
if (!notification.YesNo)
{
e.Cancel = true;
}
else
{
cancellationTokenSource.Cancel();
}
}
}
