Hi,

I would like to "extend" my domain classes without having to add data to the domain classes themselves. Concider I have the following class:

public class Person
{
public virtual int Id { get; private set; }
public virtual string Name { get; set; }
}

And I have the following table in the database:

tblPersons
---------------
Id integer
Name varchar(50)
CreatedBy varchar(50)
CreatedDate datetime

So I don't want to add "CreatedBy" and "CreatedDate" to my domain class, because this has nothing to do with the actual domain itself...

Would it be possible to get this data whenever I load an entity? I would like to use it like this:

Person person = session.Load(1);

person.CreatedBy(); <-- CreatedBy is an Extension function... doesn't really matter how I access the CreatedBy value... as long as I don't have to add it to the Person class
person.CreatedDate(); <-- CreatedDate is an Extension function... doesn't really matter how I access the CreatedDate value... as long as I don't have to add it to the Person class

Can anyone point me in which direction to go in order to implement this?

I have thought about the following possibilities:

* Implementa a custom ProxyFactory, where I inject a custom "interface" such as IUpdateable, howver it seems like NHibernate doesn't create the proxies consistently, sometimes it loads a my "proxy class" class, and sometimes it loads the "normal class":

Person person = session.Load(2); //this will load my Proxy class of Person just fine

Address address = person.Address; //Somehow this doesn't load a Proxy for Address, but instead loads it normally - seems like it's evaluating "ImmediateLoad", which doesn't load proxies, due to lazy loading... not sure how to make this behave as I want.

*Using a custom PropertyAccessor, I have read something about this - but it seems I must actually map this to a property that EXITS on the domain class... so that wouldn't work right?

*Just as NHibernate "injects" code to the runtime when creating the Proxy classes - perhaps I could do the same but inject the "interface" to the original Person class instead?

Would appreciate any help on this, thank you! :)