C# 关闭窗体事件

点击窗体的FormClosing事件，插入 如下代码：

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;
            }
        }