when I create object A I use object B to validate some details. I also set A's foreign key id to B's Id

when saving object A I dont want to save object B cause it should not be altered.. only using it for validation.

How can I achieve this ?

Jaded

You can use Session.Evict(object).
After this call, "object" will never sincronize to database.

Doesn't Evict() remove the object from the session cache? If so, is there a way to leave it in the cache (in case it's needed often) but not consider it when flushing (because it's almost never updated)?