asp.net global.asax Application_BeginRequest

I have a site with multiple domains pointing to it. I wanted to redirect all requests to main domain so I've created a method called RedirectToRealDomain("domain.com") to check and redirect all requests to my preferred domain

At the moment it lives on Session_Start but I am planing to move it to Application_BeginRequest event.

Is that good idea? As I understand Session_Start only raised when new session started but Application_BeginRequest raised on all requests. RedirectToRealDomain method doesn开发者_StackOverflow中文版't do any DB lookups or anything expensive apart from comparing strings.

---

Yes, that will work. I use an HTTP module's "BeginRequest" event to do the same thing on my site.

Another option is to create a 2nd IIS site and point all of the other domains to this site. Then you can use the IIS management console to redirect all requests to the 1st site.

---

This should be fine, but there are other non-programming ways of doing this from within IIS, which I presume would be less overhead and probably a more "correct" way of doing it. Your understanding of when the events are raised is correct, though and your solution should work and not be too much of a server drain.

See here for how to do it in IIS:

http://www.getfoundnow.com/iis_301_redirect.htm