ใครเคยเขียน Web Browser ด้วย C# บ้างครับ คือว่าต้องทำการบ้านอยากให้ เก็บค่า history ต้องทำยังไงครับ

private void addNewTab()
{
    // create a new TabPage object
    TabPage tpage = new TabPage(); 
    tpage.BorderStyle = BorderStyle.Fixed3D;
    //add the newly created TabPage
    //to the tabcontrol's collection of tab pages 
    browserTabControl.TabPages.Insert(
        browserTabControl.TabCount - 1, tpage);
    //create a WebBrowser object
    WebBrowser browser = new WebBrowser();
    browser.Navigate(homePage); 
    //add the browser object to the tab page 
    //you created previously
    tpage.Controls.Add(browser);
    browser.Dock = DockStyle.Fill;
    browserTabControl.SelectTab(tpage);
    //add some event handlers to your browser object
    browser.ProgressChanged += new 
      WebBrowserProgressChangedEventHandler(Form1_ProgressChanged);
    browser.DocumentCompleted += new 
      WebBrowserDocumentCompletedEventHandler(Form1_DocumentCompleted);
    browser.Navigating += 
      new WebBrowserNavigatingEventHandler(Form1_Navigating);
    browser.CanGoBackChanged += 
      new EventHandler(browser_CanGoBackChanged);
    browser.CanGoForwardChanged += 
      new EventHandler(browser_CanGoForwardChanged);
}

private void addLink(String url, string name)
{   
   //open the xml file 
    XmlDocument myXml = new XmlDocument();
   //and a new element to the xml file
    XmlElement el = myXml.CreateElement("link");
    el.SetAttribute("url", url);
    el.InnerText = name;

    if (!File.Exists(linksXml))
    {
        XmlElement root = myXml.CreateElement("links");
        myXml.AppendChild(root);
        root.AppendChild(el);
    }
    else
    {
        myXml.Load(linksXml);
        myXml.DocumentElement.AppendChild(el);
    }
    //if the links bar is visible then 
    //you have to add a ToolStripButton
    if (linkBar.Visible == true)
    {
       //create a new ToolStripButton object with the favicon image,
       //website name the click eventhandler to 
       //navigate to the specific web site               
        ToolStripButton b =
                  new ToolStripButton(el.InnerText, getFavicon(url), 
                  items_Click, el.GetAttribute("url"));
        b.ToolTipText = el.GetAttribute("url");
        //the MouseUp event is used 
        //for showing the context menu of this button 
        b.MouseUp += new MouseEventHandler(b_MouseUp);
        linkBar.Items.Add(b);
    }

    myXml.Save(linksXml);
}