private void aboutWindow_Closed(object sender, EventArgs e)
{
aboutWindow = null;
}
private void MenuItem_Click_About(object sender, RoutedEventArgs e)
{
if (aboutWindow == null)
{
aboutWindow = new AboutWindow();
aboutWindow.Closed += new EventHandler(aboutWindow_Closed);
aboutWindow.Owner = this;
aboutWindow.ShowDialog();
}
else
{
aboutWindow.Focus();
}
}
