S. Somasegar (aka Soma), Senior VP of Microsoft's DevDiv, had a recent post about what is coming with .NET 4 and VS2010.
http://blogs.msdn.com/somasegar/archive/2008/11/12/net-fx-4.aspx In it he writes: ... as well as end-to-end solutions for data validation from declarative data on the database tier all the way through to the client UI. You will be able to write validation logic once – have it run anywhere and this framework will work with any data access layer - the Entity Framework, LINQ to SQL, ADO.NET, nHibernate, etc. Note that in addition to Microsoft's own data access stacks, he includes NHibernate. I thought that was pretty cool. James
