Winform 窗体关闭事件

//窗体关闭前事件
        private void FrmMain_FormClosing(object sender, FormClosingEventArgs e)
        {
            DialogResult result = MessageBox.Show("确认退出吗？", "退出询问",
                MessageBoxButtons.OKCancel,
                MessageBoxIcon.Question);
            if(result == DialogResult.Cancel)
            {
                e.Cancel = true;
            }else
            {
                e.Cancel = false;
            }
        }

//窗体关闭前事件privatevoidFrmMain_FormClosing(object sender, FormClosingEventArgs e)
{
DialogResult result = MessageBox.Show("确认退出吗？", "退出询问",
MessageBoxButtons.OKCancel,
MessageBoxIcon.Question);
if(result == DialogResult.Cancel)
{
e.Cancel = true;
}else
{
e.Cancel = false;
}
}