Design an Appropriate Data Access Object Model

• ADO.NET: More than a Matter of ABCs

  http://www.samspublishing.com/articles/article.asp?p=102202&seqNum=2&rl=1

• Comparison of ADO.NET and ADO

  http://msdn.microsoft.com/library/default.asp?url=/library/en-us/vbcon/html/vbconA-DOPreviousVersionsOfADO.asp