private void buttonManage_Click(object sender, EventArgs e)
{
dataGridViewList.Hide();
if (mf == null)
{
mf = new ManageForm();
mf.MdiParent = this;
mf.FormClosed += mf_FormClosed;
mf.Show();
}
else
{
mf.Activate();
}
}
void mf_FormClosed(object sender, FormClosedEventArgs e)
{
mf = null;
//throw new NotImplementedException();
}
