Unload event for the default Application Domain?

Question

Is there an Unload event, or any event, notification, message, mechanism, or hook, that i can use to be notified before the "default" application domain is unloaded?

i have code that needs to know when the application domain (almost always the default domain) is ending.

Note: i don't know what kind of application a developer will be creating when he uses my code. It could be:

• a console application
• a WinForms application
• an ASP.net application
• an ASP.net web-site
• Runtime Callable Wrapper (RCW) COM object
• a Windows Explorer shell extension
• or a Windows Service

Either way, i need to know when the domain is closing, so i can do some "stuff" . And i am not going to require the user to call any sort of "Shutdown" or "Cleanup" method. (Also, suggesting that the user be required to call a method themselves doesn't answer the question: which is about being notified when the app domain i'm running in is shut down).

See also

• Unload event for the default AppDomain?
• How to get notified before static variables are finalized

Answer 1

i forgot to cross post my own answer from my other slight variation of this question . Ultimately, the answer came from an answer by MA Hanin .

There is no DomainUnload , but there is a ProcessExit :

class Contoso
{
   //constructor
   public Contoso()
   {
      //...

      //Catch domain shutdown (Hack: frantically look for things we can catch)
      if (AppDomain.CurrentDomain.IsDefaultAppDomain())
         AppDomain.CurrentDomain.ProcessExit += MyTerminationHandler;
      else
         AppDomain.CurrentDomain.DomainUnload += MyTerminationHandler;
   }

   private void MyTerminationHandler(object sender, EventArgs e)
   {
      //The domain is dying. Serialize out our values
      this.Dispose();
   }

   ...
}

Note : Any code is released into the public domain. No attribution required.

Answer 2

AppDomain.CurrentDomain.DomainUnload += 
    (object sender, EventArgs e) => { /*do stuff*/ };