N-Tier Application Development with .NET

A few articles on n-teir architecture in .Net

Part 1:What is N-Tier Architecture?
Part 2:How to implement the Business Layer
Part 3:How to implement the Data Layer

LLBLGen::About n-tier development
N-Tier Applications and .NET

Part 1:Architecture prototype revised and tested - level 400
Part 2:Architecture prototype revised and tested - level 400