c# - IParameterInspector and Exception Handling -

in wcf service methods have attribute defined. attribute class inherits attribute & ioperationbehavior , adds iparameterinspector behavior. iparameterinspector instantiated class provides beforecall & aftercall methods.

problem: exceptions raised inside method call beforecall method not caught. have tried couple of solutions including ierror available none of them have worked.

this code: service method:

    [operationbehavior]     [myauthorization(role = enums.psoroles.dicequote)]     public list<employee> getemployee(int eid)     {     try     {     return _empservice.getemployee(eid);     }     catch (exception ex)     {     _logger.error(ex);     throw new faultexception(ex.message, new faultcode(httpstatuscode.internalservererror.tostring()));     }            }      public class myauthorization : attribute, ioperationbehavior     public void applydispatchbehavior(operationdescription operationdescription, dispatchoperation dispatchoperation)     {         dispatchoperation.parameterinspectors.add(new myauthorizationparameterinspector());     }       public class myauthorizationparameterinspector : iparameterinspector     public object beforecall(string operationname, object[] inputs)     { ...  }      public void aftercall(string operationname, object[] outputs, object returnvalue, object correlationstate)     { ... }  

thanks help.