public Form1()
        {
            InitializeComponent();
            webBrowser1.Navigated += webBrowser1_Navigated;
            webBrowser1.Navigate("http://www.baidu.com");
        }
        private void webBrowser1_Navigated(object sender, EventArgs e)
        {
            Save();
        }
        private void Save()
        {
            string text = webBrowser1.DocumentText;
        }
text就是源代码,html内容,自己做保存处理就可以了