Newbie Guide to Data Access Objects/Business Objects

Hi There,

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I'm in the process of moving my development style from a two tier procedural approach to a more object oriented layered technique. At the moment I'm using Visual Studio 2005, Enterprise Library 3.1 and SQL Server 2005. These are architectural constraints.

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I'm finding it difficult as I can't seem to find a definitive guide to business or data objects. I've been reading "Effective Use of the Microsoft Enterprise Library" and "Business Objects" by Rockford Lhotka. While the Enterprise Library literature focusses heavily on encapsulation of functionality, it is constrained� to the Enterprise Library content. While the data access is contained within an ideal framework, I find myself creating the Enterprise Library objects in form on load events and deleting them in the unload events.

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While Rockford's book is a step in ...