I have two NHibernate-managed entities that have a bi-directional one-to-many relationship:

public class Storage
{
    public virtual string Name { get; set; }
    public virtual IList<Box> Boxes { get; set; }
}

public class Box
{
    public virtual string Box { get; set; }
    [DoNotSerialize] public virtual Storage ParentStorage { get; set; }
}

A Storage can contain many Boxes, and a Box always belongs in a Storage. I want to edit a Box's name, so I send it to the client using JSON. Note that I don't serialize ParentStorage because I'm not changing which storage it's in.

The client edits the name and sends the Box back as JSON. The server deserializes it back into a Box entity.

Problem is, the ParentStorage property is null. When I try to save the Box to the database, it updates the name, but also removes the relationship to the Storage.

How do I properly serialize and deserialize an entity like a Box, while keeping the JSON data size to a minimum?