HtmlAgilityPack.HtmlDocument doc = new HtmlAgilityPack.HtmlDocument();
 doc.LoadHtml(webBrowser1.Document.Body.InnerHtml);
 var pars = doc.DocumentNode.SelectNodes("//p");
 foreach (HtmlNode item in pars)
 {
     HtmlElement element = ElementFromWebBrowserControlWhichMatches(item);
    // ElementFromWebBrowserControlWhichMatches is what I am searching for
 }