title: ValidateRequest=“false” and .NET 4 problem
body: <p>.NET 4 broke <code>ValidateRequest=“false”</code> for some reason.  </p>
  
  <p>The solution is -- just put  <code>&lt;httpRuntime requestValidationMode="2.0" /&gt;</code> into your web.config file.</p>
  
  <p>The problem with that solution is that it breaks support for .NET 2.0!  </p>
  
  <p>IIS refuses to accept unknown attributes in web.config.  Also I don't like the all or nothing nature of this.  </p>
  
  <p>Can I set requestValidationMode (or in some other way disable request validation) for a single page that needs it?  Without breaking backwards compatibility of <code>web.config</code> with 2.0?</p>