I have one project using NHibernate 1.2. I know it\'s old, but I\'ve used it since I\'m working off NHibernate in Action, which targets that same version.
I\'ve been
Off the top of my head and mixing 2.X and 3.0 features... LINQ support, EventListeners (more powerful Interceptors), System.Transaction support, generics support, multiquery, future queries, SchemaUpdate (rather than just SchemaExport), much better HQL parser, ... Plus numerous bug fixes. A lot has been going on in the NHibernate world since NH 1.2...
You get Linq support!
v3: Removal of the dependency on log4Net (which is often a love-it or hate-it thing)
With the 3.0.0 release, NHibernate includes support for LINQ, along with additional features such as:
Along with a long list of bug fixes and improvements, it has several new features including
LINQ
, overcoming the HQL
limitations of the previous provider.Breaking change:
James Kovacs summarized it pretty well, but for a complete list of changes check https://nhibernate.svn.sourceforge.net/svnroot/nhibernate/trunk/nhibernate/releasenotes.txt
It contains every single bug/improvement/new feature for all NH releases.
I started on 2.x+ so I can't say much...but I'll for sure upgrade to 3.0 once it's out of beta. Mainly because QueryOver
looks like ICriteria on type safe steriods!