????Global.asax ????????????? ASP.NET ??ó????????????????????????λ???????ó???????鼶?????????????????????????????ó??????????????Щ?????????????????????????????ó??????????????????????
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????Global.asax λ????ó???????????? Visual Studio .NET ????????????????????е? ASP.NET ????У???????????????????????????????????????——?????????????????????????.asax ????????????????????ó???????????????????? aspx ?? ASP.NET ?????
????Global.asax ???????????κΣ???? URL ?????? HTTP ??????????????????????????????????????ASP.NET ?????????????????Global.asax ??????????κθ?????? Global.asax ???????ASP.NET ???????????????ó?????????????е???????????????????????????????????ó?????
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????Global.asax ????????HttpApplication ??????????HttpApplication ??????????????????????е??????????ó???Global.asax ????????????????
????· Application_Init??????ó?????????????α????????????????????????????е?HttpApplication ??????????????????á?
????· Application_Disposed??????ó??????????????????????????????????????λ?á?
????· Application_Error??????ó????????????δ???????????????????????
????·Application_Start????HttpApplication ????????????????????????????????????????????????????HttpApplication ???????????
????· Application_End????HttpApplication ???????????????????????????????????????ó?????????????????????????Ρ?
????·  Application_BeginRequest?????????????ó??????????????????????????????????????????????????????????????????????????????URL????
????·  Application_EndRequest???????ó?????????????????
????·   Application_PreRequestHandlerExecute???? ASP.NET ?????????????????? Web ???????????????????????????????????
????·   Application_PostRequestHandlerExecute???? ASP.NET ????????????????????????????????????????
????·   Applcation_PreSendRequestHeaders???? ASP.NET ???????? HTTP ??????????????????????????????????
????·  Application_PreSendContent???? ASP.NET ????????????????????????????????????????????
????·  Application_AcquireRequestState???? ASP.NET ????????????????????????Session ????????????????????
????·  Application_ReleaseRequestState???? ASP.NET ?????????????е????????????????????????????????????е?????鱣?????????????????
????·   Application_ResolveRequestCache???? ASP.NET ??????????????????????????????????????????????????????????????????????????????????С?
????·   Application_UpdateRequestCache???? ASP.NET ?????????????????????????????????????????????????洢???????????????????????????á?
????·   Application_AuthenticateRequest????????齨????????????Ч?????????????????????????????????????????????
????·  Application_AuthorizeRequest?????????????????????????????????????????????
????·  Session_Start??????????????????ó??? Web ???????????????????
????·   Session_End????????????????????????????????ó??? Web ???????????????????
???????????б?????????????????????????????????Щ?????????????á?
?????????Щ??????????????????????????????????Application_Init ??Application_Start ???????ó???????????????????Ρ???????Application_Disposed ?? Application_End ???????ó???????????????Ρ?????????????????Session_Start ?? Session_End???????????????????????á???????????????ó?????????Щ?????????????????
????·  Application_BeginRequest
????·   Application_AuthenticateRequest
????·  Application_AuthorizeRequest
????· Application_ResolveRequestCache
????·  Application_AcquireRequestState
????·  Application_PreRequestHandlerExecute
????·  Application_PreSendRequestHeaders
????·   Application_PreSendRequestContent
????·  <<??д???>>
????·   Application_PostRequestHandlerExecute
????·  Application_ReleaseRequestState
????·  Application_UpdateRequestCache
????·   Application_EndRequest