private void aTIVIDADE2ToolStripMenuItem_Click(object sender, EventArgs e)
{
if (Application.OpenForms.OfType <frmExercicio2>().Count() <= 0)
{
frmExercicio2 frm2 = new frmExercicio2();
frm2.Show();
}
}
private void exercicio2ToolStripMenuItem_Click(object sender, EventArgs e)
{
Form fc = Application.OpenForms["frmExercicio2"];
if (fc != null)
{
fc.Close();
}
frmExercicio2 FrmExercicio2 = new frmExercicio2();
FrmExercicio2.MdiParent = this; // anexar o form 'filho' dentro do form 'pai'
FrmExercicio2.WindowState = FormWindowState.Maximized;
FrmExercicio2.Show();
}