I'm trying to catch some specific exception. The problem is that my program is complex and can hide this exception as a 'primary' exception or as an inner exception inside an aggregated exception. (it could also be an inner of an inner exception and so on) How do I catch this in an elegant way? What I've done so far

            catch (Exception e) when (e.InnerException is MyOwnSpecialErrorException)
            {
                var e1 = e.InnerException as MyOwnSpecialErrorException;
                success = false;
                exception = e1;
            }

and also:

        catch (MyOwnSpecialErrorException e) 
        {
            success = false;
            exception = e;
        }

Of course here I only take care in the case of one nested inner exception, and also this assumes that it is the first inner exception. Can someone think of some way?

CodePudding user response：

That's the more concise syntax I can think of, featuring the is operator:

bool success;
MyOwnSpecialErrorException exception;
try
{
    //...
}
catch (AggregateException aex)
    when (aex.Flatten().InnerExceptions.OfType<MyOwnSpecialErrorException>()
        .FirstOrDefault() is MyOwnSpecialErrorException myEx)
{
    success = false; exception = myEx;
}
catch (MyOwnSpecialErrorException ex)
{
    success = false; exception = ex;
}
catch
{
    success = true; // Ignore all other exceptions
}