How to Catch All Exceptions?

Question

I wish to catch all exceptions on runtime, not debug time. You know, like when user face any issue, I can catch it and display it on screen for bug reporting. I am looking for a global catcher. Instead of catching few codes in a try+catch block, I catch eveything in my application.

How do I do that? Thank you for the help.

Answer 1

Put one Try - Catch around your entire application and rethrow all your other Catches.

Answer 2

Write an event handler for the AppDomain.UnhandledException event.  If you use Windows Forms, you'll also need one for Application.ThreadException.  I think WPF uses Dispatcher.UnhandledException, not that sure.  You cannot trap SEH exceptions that are raised in a thread that was started by unmanaged code.

When you catch these exceptions, be sure to terminate your app.

---

Hans Passant.

Answer 3

There are three weird exceptions which require additional knowledge/usage when attempting to handle them via try/catch.

The three are ThreadAbortException, OutOfMemoryException and StackOverflowException.

Answer 4

Thank you nobugz, this is what I am looking for. I am using Try-Catch, but, that requires me to know where the exception may thrown. Using your approach is the right way to catch unexpected exceptions.