title: Regex using vb.net to replace & with &amp; but do not replace & of &nbsp;
body: <p>I have a dynamic HTML string which contains characters like </p>
  
  <pre><code>&amp; and &amp;nbsp; 
  </code></pre>
  
  <p><strong><code>i want to replace &amp; with &amp;amp; but dont want to replave &amp; of &amp;nbsp;</code></strong> </p>
  
  <p>i am using VB.net for this. Please suggest thanks. </p>