private void onAboutButtonClick(object sender, EventArgs e)
{
if (aboutForm != null)
{
aboutForm.Focus();
}
else
{
aboutForm = new AboutGame();
aboutForm.FormClosed += onAboutGameFormClosed;
aboutForm.Show();
}
}
private void onAboutGameFormClosed(object sender, FormClosedEventArgs e)
{
aboutForm = null;
}