Hi..

I have a solution that contains three projects. A main project with my MVC app, a silverlight application and a (silverlight enabled) WCF service project.

In my silverlight project i have made a Service Reference to my WCF service. And i pretty much got that working.

In my WCF service i have a method that returns an Book object, which got some random fields like title, date etc. In the book class, i have a ICollection field that contains a list of events.

The book class is generated using entity framework 4.0, and Lazy Loading is enabled.

If i in my getBook(int id) method return a book with the events field not initialized, it works as a charm.

But if i initialize the field, i'm getting this error.

The server did not provide a meaningful reply; this might be caused by a contract mismatch, a premature session shutdown or an internal server error.

I have a few ideas why that is happening, and while writing this i just got another one.

1. The wcf service somehow threw away the reference to the event class. That would be very weird since i have a reference between my main mvc app (with the models) and my WCF service.

2. Since i have enabled lazy loading in EF 4.0, i suspect that it may be the thing generating the error. But i'm not sure why that would be, because i'm not in any way accessing that field. I could understand that i may not be able to access the events field after i recive the object in my silverlight application since the connection between the book object and the entity framework is like broken.

Did i mention that Lazy Loading is enabled on my EF instance? And there is no inner exception in the thrown exception.

Thanks in advance. Malte Baden Hansen