title: Keeping ObjectId reference in an Autocad .Net WCF plugin
body: <p>There is a .Net Autocad plugin in which a WCF service is used to call a method
  on another process external to Autocad. Autocad entities are wrapped in custom classes and passed through WCF. Once the call returns the plug-in needs to write the result back into Autocad database.</p>
  
  <p>Here is the problem: ObjectId is needed to fetch the object and write the result back; WCF serialize the data and ObjectId is not serializable. So I don't have access to the object.</p>
  
  <p>Is there any workaround/solution for this?</p>