title: How to combine node collections?
body: <p>there is a question <a href="https://stackoverflow.com/questions/23411107/how-can-i-combine-two-nodecollection">How can I combine two nodecollection?</a>  which is about combining two collections.</p>
  
  <p>I want to set it like</p>
  
  <pre><code>         var sas=(HtmlNodeCollection) null;
  </code></pre>
  
  <p>then use</p>
  
  <pre><code>        sas+=ca.DocumentNode.SelectNodes("//strong");
  </code></pre>
  
  <p>is this possible?</p>