Using adapter, C#, LLBLGen 2.6, .Net 2.0, what is the easiest way to fetch a related collection into an existing entity?

I realise that I can use Prefetch paths if I am initially instantiating the entity, but what about the case where the entity was fetched without its collections? I'd like to be able to access the collection via the original entity, rather than just retrieve a collection into a new EntityCollection object.

CustomerEntity customer = new CustomerEntity("CHOPS");
//... fetch customer

DataAccessAdapter adapter = new DataAccessAdapter();
adapter.FetchEntityCollection(customer.Orders, customer.GetRelationInfoOrders());

Thanks Walaa - I should have known.