private void linkLabel2_LinkClicked(object sender, LinkLabelLinkClickedEventArgs e)
 {
     // show about box
     AboutWindow about = new AboutWindow();
     about.ShowDialog();
 }
 private void aboutStripMenuItem1_Click(object sender, EventArgs e)
 {
     // show about box
     AboutWindow about = new AboutWindow();
     about.ShowDialog();
 }