private void atividade5ToolStripMenuItem_Click(object sender, EventArgs e)
{
if (Application.OpenForms.OfType <frmExercicio5>().Count() <= 0)
{
frmExercicio5 frm5 = new frmExercicio5();
frm5.Show();
}
}
private void exercicio5ToolStripMenuItem_Click(object sender, EventArgs e)
{
Form fc = Application.OpenForms["frmExercicio5"];
if (fc != null)
{
fc.Close();
}
frmExercicio5 FrmExercicio5 = new frmExercicio5();
FrmExercicio5.MdiParent = this; // anexar o form 'filho' dentro do form 'pai'
FrmExercicio5.WindowState = FormWindowState.Maximized;
FrmExercicio5.Show();
}