Earlier this year I wrote an article on how to implement value objects (as mentioned by Martin Fowler en Eric Evans in their books, respectively Patterns of Enterprise Application Architecture and Domain Driven Design). It appeared in English in International Developer Magazine (from Australia), and was later translated into German to appear in ObjectSPECTRUM. Finally it now also features in Microsoft’s .Net Magazine in its Dutch translation – which I reviewed before print, and which is a slightly better article than the original English one.
Anyway, download the Dutch PDF here: Value objecten implementeren or visit the Microsoft site (also the Dutch version): Implementing value objects. Quick wins in domain driven development.