ASP.net Application Domains Notification Question

[a_newcomb]

I have an asp.net application that clients connect to and block until
data destined for the client is received, and subsequently routed down
the connection. Because of this, it is possible that clients are
connected for an extended period of time. When some event occurs to
the web application, which forces the aspnet_wp.exe to create a new
application domain for the application, is there any way to be notified
of such event? Is there a way to handle via the HTTPApplication or any
other object (Global??) an event that is triggered when a new
application domain is created? Or any where to determine that multiple
application domains exist for the current asp.net Application?

thanks,
-a.n.