htmlWeb hw = new HtmlWeb();
        if (txtCurrentURL.Text == "")
        {

            MessageBox.Show(" Enter Web Address to Process ");
        }
        else
        {
            HtmlAgilityPack.HtmlDocument htmlDoc = hw.Load(@txtCurrentURL.Text);
            if (htmlDoc.DocumentNode != null)
            {
            try
            { foreach (HtmlNode text in htmlDoc.DocumentNode.SelectNodes(txtExpression.Text))
                    {
                        _items.Add(text.InnerHtml);
                        richTextResults.Text = text.InnerHtml;
                    } }

              catch
              {   MessageBox.Show(" No Usefull Data found");
              }
                  lstBxResult.DataSource = _items;
            }
        }

private HtmlWeb CreateWebRequestObject()
{
    HtmlWeb web = new HtmlWeb();
    web.UseCookies = true;
    web.PreRequest = new HtmlWeb.PreRequestHandler(PreRequestStuff);
    web.PostResponse = new HtmlWeb.PostResponseHandler(AfterResponseStuff);
    web.PreHandleDocument = new HtmlWeb.PreHandleDocumentHandler(PreHandleDocumentStuff);
    return web;
}