How to use The Custom Indicator in multiple timeframes

Dear:

     if i have a Custom Indicators CS. So How to  use The CS of Custom  Indicato  in   multiple timeframes.

eg:

 public IndicatorDataSeries Result { get; set; }

        private MarketSeries series5;
        protected override void Initialize()
        {
            // Initialize and create nested indicators
            series5 = MarketData.GetSeries(TimeFrame.Minute5);
        }

        public override void Calculate(int index)
        {

            Result = Indicators.CS(series5, 0);                        ****line 9

            // Calculate value at specified index
            // Result[index] = ...
        }

the *********line 9 is wrong in builder。  

   Error CS1061: “cAlgo.API.Internals.IIndicatorsAccessor” donot contain“CS”..................

how to add the CS to “cAlgo.API.Internals.IIndicatorsAccessor" or else  Solution??

waiting for your response,thanks !