Client.OpenReadAsync(uri);
Client.OpenReadCompleted +=new OpenReadCompletedEventHandler(Client_OpenReadCompleted);
Client.OpenReadAsync(uri);

An exception occurred during the operation, making the result invalid.  Check InnerException for exception details.

<object data="data:application/x-silverlight-2," type="application/x-silverlight-2" width="100%" height="800px">
   <param name="enablehtmlaccess" value="true"/>
   <param name="source" value="ClientBin/conv.xap"/>
   <param name="onError" value="onSilverlightError" />

<?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>