void backgroundWorker_RunWorkerCompleted(object sender, System.ComponentModel.RunWorkerCompletedEventArgs e)
{
Tuple <string, bool> r = e.Result as Tuple <string, bool>;
MessageBox.Show(r.Item1);
if (r.Item2)
{
wizard.next(this);
}
else
{
wizard.frame.Navigate(this);
}
}
