title: How remove css class in code behind .net 2.0
body: <p>My div contains 4 css class I whant to delete one from them
  for adding I do this:</p>
  
  <pre><code>MyDivId.Attributes["class"] += " addedClass";
  </code></pre>
  
  <p>in newest framework they can be done like this:</p>
  
  <pre><code>MyDivId.CssClass.Replace("addedClass", "");
  </code></pre>
  
  <p>but in .net 2.0 not found <code>CssClass</code></p>
  
  <p>some proposals?
  thx in advance!</p>