http://stackoverflow.com/questions/14986886/order-of-execution-of-the-absolute-earliest-places-to-run-code-in-asp-net

Sequence of Start Up Events:

1. • Reading web.config
2. • Executing all methods marked with PreApplicationStartMethodAttribute
3. • Application start event: AutoEventWireup starts to work
4. • Executing all methods marked with PostApplicationStartMethodAttribute

AutoEventWireup:

http://stackoverflow.com/questions/2058621/difference-between-application-start-and-application-onstart methods matching this pattern are searched: ModuleName_EventName, or ModuleName_OnEventName AutoEventWireup: ModuleName_EventName, or ModuleName_OnEventName e.g. Page_Load Application_Start

Example Events:

• Application_OnStart: before first request, after startup
• Application_OnEnd: after last request, before shutdown
• Session_OnStart: before each unique user session, if without cookie, then for every request
• Session_OnEnd: before? user session expires

note: for multiple matches of the same event, the last one wins for example if both Application_Start + Application_OnStart exist, Application_OnStart will be executed because it appears in the code later