title: how to add subscript in asp boundfield header text
body: <p>I want headername to be CO<sub>2</sub> with 2 as subscript 
  this is my code.</p>
  
  <pre><code>&lt;asp:BoundField DataField="CO2" HeaderText="CO2" /&gt;
  </code></pre>
  
  <p>so far i tried </p>
  
  <pre><code>&lt;asp:BoundField DataField="CO2" HeaderText="CO&lt;sub&gt;2&lt;/sub&gt;" /&gt;
  </code></pre>
  
  <p>but this did not work.</p>
  
  <p>please suggest a way</p>