Multiple Exceptions have occurred, what's the right way to rethrow?

Question

public void DoRiskyThings(List<Action> tasks)
{
  List<Exception> exceptions = new List<Exception>();
  foreach(Action task in tasks)
  {
    try {task()}
    catch (Exception e) {exceptions.Add(e)};
  }

  if (exceptions.Any())
  {
    //... what goes here?
  }
}

I'd like to preserve all the information (especially messages and stacktraces).

See this highly upvoted answer: http://stackoverflow.com/a/178464/555547 — Jason, Feb 24 '12 at 21:14
@Jason that's great but that method of rethrow only works from inside a catch block. I'm outside of it. — Amy B, Feb 24 '12 at 21:16
@Jason: He wants to throw _multiple_ exceptions. That won't work. — SLaks, Feb 24 '12 at 21:16
Just noticed that, see http://stackoverflow.com/a/278543/555547 — Jason, Feb 24 '12 at 21:16

score 5 · Accepted Answer · answered Feb 24 '12 at 21:13

5

You're looking for the AggregateException class.

answered Feb 24 '12 at 21:13

SLaks

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Ah, I need .net 4, but I see I can make my own. Thanks. – Amy B Feb 24 '12 at 21:15

score 2 · Answer 2 · answered Feb 24 '12 at 21:16

2

Just bundle your list into a super-exception:

class MultiException : Exception
{
    public List<Exception> ExceptionsList { get; set; }
}

answered Feb 24 '12 at 21:16

AVIDeveloper

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Multiple Exceptions have occurred, what's the right way to rethrow?

2 Answers2