winform窗口关闭提示

private void Form1_FormClosing(object sender, FormClosingEventArgs e)

{

if (MessageBox.Show("你确定要退出本系统吗？", "退出", MessageBoxButtons.OKCancel, MessageBoxIcon.Question, MessageBoxDefaultButton.Button2) == DialogResult.OK)

{

Application.ExitThread();

}

else { e.Cancel = true; }

}