Thanks for your explanation, it is a little clearer for me now.
Anyway, is there somewhere a diagram which would explain how proxies work, are created? When an instance of IFieldInterceptor is created? As Oren said, PostSharp can intercept fields. In order to create an aspect for static proxies which behaves correctly, I'd like to be sure to understand well all this part of NH, so I don't miss anything out. If such a document or diagram doesn't exist, then I'll open a new thread with the questions I might have. Thanks !
