Hi,
How to use Pathfor in this case : Cutomers -> Orders -> OrderDetail.
Customers.Include(Customer.PathFor(c => c.Orders.OrderDetail))
the problem is I can't access OrderDetail from the RelatedEntityList Orders, the property OrderDetail isn't available.
Note : I am using Code First, since PathFor isn't available in the Codefirst's entities I added your implementation in my base class