Recursive graph's inner collections' hidden properties serialization

[MonDeveloper]

I tested it but unfortunately it doesn't fit my need.

You introduced a new class called SerializableChangeTrackingCollection<T> but you used it only at client side, doing this way you are able to serialize just the hidden properties (the deletedEntities) at the root level.
I try to explain better:
The client retrieves 6 Order and it puts these 6 Order into a SerializableChangeTrackingCollection<Order> collection, now the client delete some item of this collection and in this way when this object is serialized it keep the info about the deleted Orders.

_It Works!!_

_But it is not enough_ because I need the same behaviour also for all the recurive collections present into the graph (for any navigation properties into the POCOs).

Imagine a different Example (I'll commit this sample into my fork asap):
The client retrieve 1 Order together with all its OrderDetails (OrderDetails is a collection of OrderDetail) and it puts this Order into a SerializableChangeTrackingCollection<Order> collection, now the client is hosting just one Order into the SerializableChangeTrackingCollection<Order> collection and that Order has a collection of many OrderDetail; if the client deletes some of those OrderDetail, since they are not "Serializable..", the information about their deletion will be lost when we serialize and deserialize the client SerializableChangeTrackingCollection<Order> collection.

[tonysneed]

Quick answer. Can you change the type of the OrderDetails property on Order from ChangeTrackingCollection<OrderDetail> to SerializableChangeTrackingCollection<OrderDetail>?