namespace SilverlightCrossDomain
{
    public class BasicClientaccesspolicyHandler : IHttpHandler
    {

        #region IHttpHandler Members

        public bool IsReusable
        {
            get { return true; }
        }

        public void ProcessRequest(HttpContext context)
        {
            XDocument clientaccessPolicyDoc = XDocument.Parse(
            @"<?xml version=""1.0"" encoding=""utf-8""?>
                        <access-policy>
                          <cross-domain-access>
                            <policy>
                              <allow-from http-request-headers=""*"">
                                <domain uri=""*""/>
                              </allow-from>
                              <grant-to>
                                <resource path=""/"" include-subpaths=""true""/>
                              </grant-to>
                            </policy>
                          </cross-domain-access>
                        </access-policy>");

            context.Response.Write(clientaccessPolicyDoc.ToString());
        }

        #endregion
    }
}

<httpHandlers >

    <!--   <add verb ="*" path="?????" type ="SilverlightCrossDomain.BasicClientaccesspolicyHandler, SilverlightCrossDomainHandler"/>
      
      -->
    </httpHandlers>