private void FormMdiAgendaTelefonica_FormClosed(object sender, FormClosedEventArgs e)
{
if (_Instance != null)
{
_Instance.Dispose();
_Instance = null;
}
}
private void agendaTelefônicaToolStripMenuItem_Click(object sender, EventArgs e)
{
FormMdiAgendaTelefonica formMdiAgendaTelefonica = FormMdiAgendaTelefonica.Instance;
// Set the Parent Form of the Child window.
formMdiAgendaTelefonica.MdiParent = this;
// Display the new form.
formMdiAgendaTelefonica.Show();
formMdiAgendaTelefonica.Focus();
}