Serializing POCO in Workflow

I was just wondering, I tried giving a POCO Object to my WF4 workflow from my MVC Application, which worked just fine until I tried persisting it. I was loading my Object in a Using and when I persisted the workflow, it told me that it can not be persisted because the context does not exist anymore. Can anyone tell me why it needs the Context to se开发者_StackOverflowrialize an object?

Getting my object with includes like this:

public User GetUser(string userName)
    {
        return (from user in _entities.Users.Include("Values").Include("RoleRelations")
                where user.Name == userName
                select user).FirstOrDefault();
    }

Without the context if you're not eager loading all relevant data for your includes when you try to serialize it will try to Lazy-load them from the context. If the context has already been destroyed the POCO object cannot be fully populated, and so cannot be cleanly serialized.