Debug silverlight without deploy in crm

If your application throw an sercurity error on

 response = (QueryOperationResponse<entityname>)contextd.Query.EndExecute(result);

Add two file as named :

clientacesspolicy.xml and crossdomain.xml  at location

C:\Program Files\Microsoft Dynamics CRM\CRMWeb

crossdomain.xml

<?xml version="1.0"?>
<!DOCTYPE cross-domain-policy SYSTEM "http://www.macromedia.com/xml/dtds/cross-domain-policy.dtd">
<cross-domain-policy>
  <allow-http-request-headers-from domain="*" headers="*"/>
</cross-domain-policy>

clientacesspolicy.xml

<?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="http://<serverurl>/<organization>/xrmservices/2011/organizationdata.svc/" include-subpaths="true"/>
      </grant-to>
    </policy>

  </cross-domain-access>
</access-policy>

I have tested this for odataservice.

run your .aspx or .html page with break point