关闭窗体FormCloseing事件

当关闭窗体时会跳出个提示对话框,提示是否退出系统;

程序代码

private void main_FormClosing(object sender, FormClosingEventArgs e)
        {
            DialogResult key = MessageBox.Show("close", "confirm", MessageBoxButtons.YesNo,MessageBoxIcon.Question);
            e.Cancel = (key == DialogResult.No);
        }