title: HTMLAgilityPack iterate all text nodes only
body: <p>Here is a HTML snippet and all I want is to get only the text nodes and iterate them. Pls let me know. Thanks.</p>
  
  <pre><code>&lt;div&gt;
     &lt;div&gt;
        Select your Age:
        &lt;select&gt;
            &lt;option&gt;0 to 10&lt;/option&gt;
            &lt;option&gt;20 and above&lt;/option&gt;
        &lt;/select&gt;
     &lt;/div&gt;
     &lt;div&gt;
         Help/Hints:
         &lt;ul&gt;
            &lt;li&gt;This is required field.
            &lt;li&gt;Make sure select the right age.
         &lt;/ul&gt;
        &lt;a href="#"&gt;Learn More&lt;/a&gt;
     &lt;/div&gt;
  &lt;/div&gt;
  </code></pre>
  
  <p><strong>Result:</strong></p>
  
  <ol>
  <li>Select your Age: </li>
  <li>0 to 10 </li>
  <li>20 and above </li>
  <li>Help/Hints:</li>
  <li>This is required field. </li>
  <li>Make sure select the right age. </li>
  <li>Learn More</li>
  </ol>