Question

I am currently developing a small application in Silverlight, and recently to try it out, i enabled out-of-browser deployment for my application. However, now after I disabled the setting, running the application now throws an exception as soon as it finishes loading.

An unhandled exception (‘Unhandled Error in silverlight application
Code: 4004
Category: ManagedRuntimeError
Message: System.Reflection.TargetInvocationException: An exception occurred during the operation, making the result invalid.

However, if I just open the TestPage.html in browser the application still works as it did.

Any ideas? Thanks

Answer 1

I found the problem. I’m not sure why activating out-of-browser and then going back required this, but adding a ClientAccessPolicy.xml file to the .web project

<?xml version="1.0" encoding="utf-8"?>
<access-policy>
  <cross-domain-access>
    <policy>
      <allow-from http-request-headers="SOAPAction">
        <domain uri="*"/>
      </allow-from>
      <grant-to>
        <resource path="/" include-subpaths="true"/>
      </grant-to>
    </policy>
  </cross-domain-access>
</access-policy>

fixed the problem.