On this page:
http://nhprof.com/Learn/Usage/ProfileAppWithConfiguration
The appender declaration is wrong (wrong class/dll name). I know what
was in the website used to work, so somebody likely updated it
recently. The correct should be:
<appender name="NHibernate.Profiler"
type="HibernatingRhinos.NHibernate.Profiler.Appender.NHibernateProfilerAppender,
HibernatingRhinos.NHibernate.Profiler.Appender" >
<sink value="tcp://
127.0.0.1:22897" />
</appender>