How can I override the default uncaught exception dialog?

Question

When an exception goes uncaught in a .NET app, the virtual machine displays an error message to the user. I'd like to be able to display my own error message, without having to put a catch block at the top level of my app (because that makes debugging uncaught exceptions more tedious).

Right now I display my own error dialog in an AppDomain.UnhandledException event listener, but the .NET-created dialog still shows up. I'd also like to avoid Environment.FailFast as that would bypass my finally blocks (to which I'm still somewhat attached).

Answer 1

If this is WinForms, you have to handle AppDomain.UnhandledException and Application.ThreadException to catch them all. Some exceptions filter into one and others into the other.

There was a similar (but not exact duplicate) question here that should help: C# - WinForms - Exception Handling for Events