Commented Issue: NullPropagation option smart detection should handle ObjectContext and ObjectQuery [995]

We try to figure out whether we should do null propagation in query composition by looking at the QueryProvider of the IQueryable. We handle Linq2Objects, Linq2Sql and EntityFramework there.

For EntityFramework, we are only handling DbContext and DbSets. We should handle ObjectContext and ObjectQuery as well there.
Comments: [Fixed](https://aspnetwebstack.codeplex.com/SourceControl/changeset/4889738b40c8ba6913f6bd9bdd5316638e51189e).