title: change in css file from .cs
body: <p>I have a specific control gridview , i apply specific CSS file on it , i wanna to change this CSS under specific condition in my .cs file, is there away to do that?</p>
  
  <p>for example :</p>
  
  <p><code>&lt;ItemStyle CssClass ="normal"/&gt;</code></p>
  
  <p>i want to change this in .cs under specific condition.</p>