I am getting a crossdomain exception which is expected?
To prevent cross-site request forgery, Silverlight allows only site-of-origin communication by default for all requests.
So, to enable a Silverlight control to access a service in another domain, the service must explicitly opt to allow cross-domain access.
If the SOA 11g (Webogic 8.1) service is hosted on your own server, then you can:
Place a clientaccesspolicy.xml file at the root of the domain where the service is hosted to configure the service to allow cross-domain access.
Place a valid crossdomain.xml file at the root of the domain where the service is hosted. The file must mark the entire domain public
For more information please check link below:https://goo.gl/7WPpoZ