private void MainForm_FormClosing(object sender, System.Windows.Forms.FormClosingEventArgs e)
{
if (MetroMessageBox.Show(this, "정말 종료하시겠습니까?", "종료", MessageBoxButtons.YesNo, MessageBoxIcon.Question) == DialogResult.Yes)
{
foreach (Form TheForm in this.MdiChildren)
{
TheForm.Close();
}
e.Cancel = false;
}
else
{
e.Cancel = true;
}
}
