void anoujs_FormClosed(object sender, FormClosedEventArgs e) { anoujs = null; }
private void addNewToolStripMenuItem_Click(object sender, EventArgs e) { if (anoujs == null) { anoujs = new AddNewOrUpdateJobStatus(n); anoujs.MdiParent = this; anoujs.FormClosed += anoujs_FormClosed; anoujs.Show(); } else { anoujs.Activate(); } }