看这里:
title : Microsoft .NET Pet Shop 3.x: Design Patterns and Architecture of the .NET Pet Shop
http://msdn.microsoft.com/library/default.asp?url=/library/en-us/dnbda/html/petshop3x.asp
title : Microsoft .NET Pet Shop 3.x: Design Patterns and Architecture of the .NET Pet Shop
http://msdn.microsoft.com/library/default.asp?url=/library/en-us/dnbda/html/petshop3x.asp
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