title: Why can't I parse this element with htmlagilitypack?
body: <p>I can't figure out how to parse the following:</p>
  
  <p>-Example webpage I'm trying to parse: <a href="http://www.aliexpress.com/item/-/255859073.html" rel="nofollow">http://www.aliexpress.com/item/-/255859073.html</a></p>
  
  <p>-Information I'm trying to get: "7-days". This is the processing time located in the left column of the shipping table.</p>
  
  <p>-The shipping table becomes visible after clicking on the "Shipping and Payment" tab (which is down the page a bit).</p>
  
  <p>So far I have tried selecting the node with different x-path values:</p>
  
  <pre><code> HtmlAgilityPack.HtmlDocument currentHTML = new HtmlAgilityPack.HtmlDocument();
   HtmlWeb webget = new HtmlWeb();
   currentHTML = webget.Load("http://www.aliexpress.com/item/-/255859073.html");
  
   string processingTime = currentHTML.DocumentNode.SelectSingleNode("/html/body/div[2]/div[4]/div/div/div[2]/div/div/div[3]/div/div/div/div[2]/table/tbody/tr/td[5]").InnerText;
  </code></pre>
  
  <p>and also:</p>
  
  <pre><code> string processingTime = currentHTML.DocumentNode.SelectSingleNode("//*[contains(concat( \" \", @class, \" \" ), concat( \" \", \"processing\", \" \" ))]").InnerText;
  </code></pre>
  
  <p>But I get this error:</p>
  
  <pre><code> System.NullReferenceException was unhandled
   Message=Object reference not set to an instance of an object.
  </code></pre>
  
  <p>I also tried their mobile phone website but they didn't display this information there.</p>
  
  <p>Any idea why this is happening and what I need to do?</p>