private void gitHubToolStripMenuItem_Click(object sender, EventArgs e)
{
if (agh == null)
{
agh = new aboutGitHub();
agh.MdiParent = this;
agh.FormClosed += agh_FormClosed;
agh.Show();
}
else
{
agh.Activate();
}
}
void agh_FormClosed(object sender, FormClosedEventArgs e)
{
agh = null;
//throw new NotImplementedException();
}