详见MSDN 体系结构部分
http://www.microsoft.com/china/MSDN/library/architecture/patterns/esp/EspPatternsForBuildingEnterpriseSolutions.mspx?mfr=true
http://www.microsoft.com/china/MSDN/library/architecture/patterns/esp/EspPatternsForBuildingEnterpriseSolutions.mspx?mfr=true