What code whould be placed in the application_start and the session_start events in global.asax?

Can you give an example of what might be best suited to place in the Applic开发者_StackOverflowation_Start and Session_Start subroutines? I know when each subroutine is called. Application_Start when the first user first accesses the web application. Session_Start when a user opens a session with the application. But what code belongs in each of these subroutines. What should the code in each subroutine do?

Just any examples? Well, in an MVC site the routes are registered in Application_Start. That's also a good place to initialize an IoC container such as StructureMap. Maybe initialize some singletons you have in your application if you want them to be readily available rather than late-bound when a user accesses them (like if they have a high initialization cost and you'd rather do one slow initial hit on the website yourself than bother a customer or two with it).

Session_Start is generally used less often, but could be a good place for per-user (or per-session, realistically) tracking of some kind.

Application_Start is often used to initialize application wide settings which need to be done once per application domain like registering object containers, reading some config initialization values, ... In Session_Start you could place some code which is tied to the specific user who started the session.

Be careful with exception handling in Application_Start. In IIS7 Integrated mode you won't have the response object or HTTPContext. See this thread: Request is not available in this context