private void listBugToolStripMenuItem_Click(object sender, EventArgs e)
{
if (alb == null)
{
alb = new aboutListbug();
alb.MdiParent = this;
alb.FormClosed += alb_FormClosed;
alb.Show();
}
else
{
alb.Activate();
}
}
void alb_FormClosed(object sender, FormClosedEventArgs e)
{
alb = null;
//throw new NotImplementedException();
}
