title: Xpath Error: Expression must evaluate to a node-set
body: <p>I get title in html . And I get <code>Xpath</code> by firebug . But when run, it have error :</p>
  
  <blockquote>
    <p>Expression must evaluate to a node-set</p>
  </blockquote>
  
  <pre><code>foreach (HtmlAgilityPack.HtmlNode linkNode in doc.DocumentNode.SelectNodes("/html/body/div/div/div[3]/table/tbody/tr/td[2]/div/table/tbody/tr/td/"))
  {
      string imageLink = linkNode.InnerText.Trim();
      richTextBox1.AppendText(imageLink + Environment.NewLine);
  }
  </code></pre>