Tracing Untraceable Exceptions

My application has been working nicely until today. Now, every time I launch it, it crashes with no obvious information but the dreaded CLR20r3.

Description:

  Stopped working



Problem signature:

  Problem Event Name: CLR20r3

  Problem Signature 01: appName.exe

  Problem Signature 02: 1.0.0.0

  Problem Signature 03: 516eb9fb

  Problem Signature 04: mscorlib

  Problem Signature 05: 2.0.0.0

  Problem Signature 06: 4a27471d

  Problem Signature 07: 20c8

  Problem Signature 08: 100

  Problem Signature 09: N3CTRYE2KN3C34SGL4ZQYRBFTE4M13NB

  OS Version: 6.1.7600.2.0.0.274.10

  Locale ID: 2057

I have read on the internet that I'm not the only one.

And the most annoying part is that if I try to debug it it won't fail...

Finally I found a blog post with answers Handling “Unhandled Exceptions” in .NET 2.0.

And I came up with this piece of code, that I placed in the Main method of my application:

AppDomain.CurrentDomain.UnhandledException += delegate(object sender, UnhandledExceptionEventArgs e)
 {
  EventLog.WriteEntry("appName", string.Format("{0} – IsTerminating = {1}", e.ExceptionObject.ToString(), e.IsTerminating), EventLogEntryType.Error, 001);
 };

Then I ran my app again and it crashed, but this time I got a NICE exception in the event viewer.

If you want to know, it was because it was not being able to load a DLL it was expecting

Thanks Mark.