See my reply on the same topic in a duplicate thread:
http://groups.google.com/group/nhusers/browse_thread/thread/780d2264163ab33f?hl=en

Cheers,
Jarda

On Mar 21, 1:39 am, kello <[email protected]> wrote:
> I don't see how an interface that derives from two other interfaces
> would help in doing different things depending on the type? For
> example
>
> if (Profile is ProfileA) DoA(); else if(Profile is ProfileB) DoB();
>
> Or when using the Visitor pattern.... Am I missing something?
>
> /Jonas
>
> On Mar 20, 10:35 pm, Germán Schuager <[email protected]> wrote:
>
> > I've worked out a similar situation using interfaces like this:
>
> > interface IProfileA
>
> > class ProfileA : IProfileA
>
> > interface IProfileB
>
> > class ProfileB : IProfileB
>
> > interface IProfileProxy : IProfileA, IProfileB
>
> > then specifying proxy="Namespace.IProfileProxy" in the base class mapping
> > and working against the interfaces.
>
> > On Thu, Mar 19, 2009 at 2:02 PM, RoyWagner <[email protected]> wrote:
>
> > > This is the situation:
>
> > > I have an abstract Profile class and 2 derived classes let’s call the
> > > ProfileA and ProfileB.
> > > Then mapping structure that I use is table per class hierarchy.
>
> > > I also  have a user class that have reference to a Profile:
>
> > > Public class User
> > > {
> > >        public virtual Profile Profile { get; set; }
> > > }
>
> > > I use lazy load for the Profile property.
>
> > > The problem is that when try to cast the User.Profile to one of the
> > > derived classes(PofileA or ProfileB) I get an error that I can’t cast
> > > ProfileProxy16982… to ProfileA.
> > > NHibernate create ProfileProxy object in order to support the lazy
> > > load and that prevent me from casting the Profile object.
>
> > > The only solution I have right now is to cancel the lazy load.- Hide 
> > > quoted text -
>
> > - Show quoted text -
>
>
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