void uati_FormClosed(object sender, FormClosedEventArgs e)
{
uati = null;
}
private void updateATrainingInformationToolStripMenuItem_Click(object sender, EventArgs e)
{
if (uati == null)
{
uati = new UpdateATrainingInformation(n);
uati.MdiParent = this;
uati.FormClosed +=uati_FormClosed;
uati.Show();
}
else
{
uati.Activate();
}
}