Did you know: Find out if an exception was thrown from a finally block!
time to read 1 min | 169 words

This is a big biggie for me, because it enables a much nicer syntax for a lot of stuff. But first, let us show this:

using(new ExceptionDetector())
{
	if(new Random().Next(1,10)%2 == 0)
          throw new Exception();
}

How can you tell, from the ExceptionDetector, if an exception was thrown or not? Well, conventional wisdom, and what I thought about until 15 minutes ago, says that you can't. I want to thank Daniel Fortunov, for teaching me this trick:

public class ExceptionDetector : IDisposable
{
    public void Dispose()
    {
        if (Marshal.GetExceptionCode()==0)
            Console.WriteLine("Completed Successfully!");
        else
            Console.WriteLine("Exception!");
    }
}
Amazing!
0 comments
Tags:

Related posts that you may find interesting:

10 Aug 2009 Undebuggable – who is killing my app?
Bugs
02 Jul 2008 Challenge: What is wrong with this code
challenges
20 Mar 2008 Csc.exe and delegate inference, or: Why C# has awkward syntax
C# wtf