Catching an exception thrown in an asynchronous callback

Question

I have a method that takes a callback argument to execute asynchronously, but the catch block doesn\'t seem to be catching any exceptions thrown by the synchronous call (

Answer 1

In short, no.

When you call submitDelegate.BeginInvoke, it spawns the new thread, returns, and promptly exits your try/catch block (while the new thread runs in the background).

You could, however, catch all unhandled exceptions like this:

AppDomain.CurrentDomain.UnhandledException += new UnhandledExceptionEventHandler(YourException);

This will catch everything in the application domain, however (not just your async method).