Exceptions not being caught

Question

We have following code:

try 
{
    // some code throwing MyException
}
catch (MyException ex)
{
    // [1]
    // no (re)throw here
}
catch (Exception ex)
{
    if (ex is MyException)
    {
        // [2]
    }
}

If we run the code without a debugger attached, everything runs fine. However, if we debug the code, we don't get to point [1] but [2]. As far as I understand the language specification this should not be possible.

Even weirder, this code used to run fine even while debugging. The strange behavior started only a few days ago.

Are you sure that [2] is really executed? The VS debugger sometimes highlights the wrong line even if the right code was executed. — dtb, Mar 08 '10 at 07:45
Is `MyException` part of other assembly? Remove the reference to it & add it again, build the project. See if that helps. — shahkalpesh, Mar 08 '10 at 08:01
Depending on original sources, it may be related to this issue : http://stackoverflow.com/questions/1577760/why-cant-i-catch-a-generic-exception-in-c — Guillaume, Mar 08 '10 at 09:02
@Guillaume 's guess is right: in the actual code the type of the exception is a type parameter. Sorry I didn't point it out in my example. — Thomas Freudenberg, Mar 08 '10 at 16:36
@Guillaume If you write an answer with your reference to the mentioned issue, I can mark it appropriately :) — Thomas Freudenberg, Mar 09 '10 at 07:19

score 1 · Answer 1 · answered Mar 08 '10 at 07:56

1

Check that you have done a full rebuild and are using the correct pdb files. Also check that you don't have some conditionally compiled code changing things (i.e. code between #if DEBUG statements).

answered Mar 08 '10 at 07:56

slugster

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score 1 · Accepted Answer · edited May 23 '17 at 10:32

1

Depending on original sources, it may be related to this issue : Why can't I catch a generic exception in C#?

edited May 23 '17 at 10:32

Community

1
1

answered Mar 09 '10 at 14:19

Guillaume

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Exceptions not being caught

2 Answers2