title: Possible to use preprocessor directives in web.config?
body: <p>I'd like to be able to do this so that I could do something like:</p>
  
  <pre><code>#if DEBUG
      &lt;!--&lt;customErrors mode="On" defaultRedirect="Error.aspx" /&gt;--&gt;
  #else
      &lt;customErrors mode="On" defaultRedirect="Error.aspx" /&gt;
  </code></pre>
  
  <p>Possible? Would make life a little easier.</p>