A: 

hi. in order to return exception you need to add above your service implementation the service behavior attribute at this format : [servicebehavior (ReturnUnknownExceptionAsFaults = true)] note that this approach shall use for debug only

liran.

Liran
I´m looking for something that will allow known exceptions to be returned to JSON binding in production environment.Thanks!
tucaz
A: 

No I don't think so - if the includeExceptionDetails setting is set to false, then all exceptions will be generic (and by design so). I don't know of any "loophole" to make some faults show up in detail in that case.

marc_s