????????????????????????????

????1??AppInitialize??PreApplicationStartMethodAttribute???????????????????????ASP.NET????????????????????????????

????2??Application_Start??HttpModule??????????????

?????????????????

???????????о????岻????????????????????????????????????????????????????????????????

???????????????????????4???????????????????????????????

????1??PreApplicationStartMethodAttribute?????????

????2??App_Code?е?appInitialize??????

????3??Application_Start??

????4??HttpModule

??????????????????????У????????????????PreApplicationStartMethodAttribute?????????????????????????????????????????

??????????????????????????

??????????????4????ASP.NET????г?????????????????Щ????????????????????????????

????????????????????????

????????????????????????飬???????????????????????

????1?????????Application_Start?????IIS??????????????д???????????κ???????????????????????????????????????

????2??AppInitialize?????????ü????????????????WebApplication?????

????3??PreApplicationStartMethodAttribute????ASP.NET 4.0????汾???????????????????????????

????4??????????????????????HttpModule?????????????????????????ASP.NET?汾??