C# WinForm关闭窗体确认

在窗体的Closing事件中加入确认代码。

private void Form1_FormClosing(object sender, FormClosingEventArgs e)
        {
            if (MessageBox.Show("您确认退出吗？", "www.cnblogs.com/jihua", MessageBoxButtons.YesNoCancel) == System.Windows.Forms.DialogResult.Yes)
            {
                Dispose();
                Application.Exit();
            }
            else
            {
                e.Cancel = true;
            }
        }