private IteratorFinallyMethodSymbol MakeSynthesizedFinally(int state)
        {
            var stateMachineType = (IteratorStateMachine)F.CurrentType;
            var finallyMethod    = new IteratorFinallyMethodSymbol(stateMachineType, GeneratedNames.MakeIteratorFinallyMethodName(state));

            F.ModuleBuilderOpt.AddSynthesizedDefinition(stateMachineType, finallyMethod);
            return(finallyMethod);
        }