We have two classes, Person and PersonLite. Person inhertits from PersonLite which contains a subset of the properties that Person contains. Both Person and PersonLite have a mapping file that points to a table named Person.

When performing a search using criteria for , the results contain the wanted PersonLite object but also an unwanted Person object for the same record.

1. If we ask for objects of type PersonLite, why does NHibernate include Person objects?

2. Is there a way to stop NHibernate from loading Person objects?

how your mapping files look like? Check the docs for explicit/implicit polymorphism in the class tag. Try to put polymorphism="explicit" and see what happens.

hth,
radu