title: Interceptors in WCF data service
body: <p>using ChangeInterceptors I can perform custom modifications on the objects currently being processed. Using QueryInterceptors I can only influence whether an object is returned by the wcf or not.
  Is there a way to modify an object or a collection of objects after retrieving them via EF from the database and before sending them? The objects in question have navigation properties which are requested, too. So retrieving them via WebGet is not an option.</p>
  
  <p>Any hints or ideas are highly appreciated</p>