ThresholdRingsRadiiParameters parameters = new ThresholdRingsRadiiParameters();
            
// The PointLayer type could take either data as
// ESRI.ArcGIS.Client.Tasks.FeatureSet, ESRI.ArcGIS.Client.BAServer.FolderItem,
// or a list of ESRI.ArcGIS.Client.BACore.PointRecord items, e.g.
//List<PointRecord> points = new List<PointRecord>() {
//    new PointRecord("Store 1", "Steiner St. & Geary Blvd", "1", 37.78415, -122.4346)};
            
// Set Stores as a list of PointRecord using implicit cast operator.
parameters.Stores = points;
            
// The StoreIDField parameter is ignored if stores are specified as a list of PointRecord.
//parameters.StoreIDField = "STORE_ID";
            
// Optionally restrict analysis to ExtendData object specified with myExtent.
//parameters.AnalysisExtent = myExtent;
            
// Set a data layer to apply summarization by.
parameters.ThresholdData = new Boundaries(new StandardLayer("US.ZIP5", zipCodesArray));
            
// Set threshold values.
parameters.Radii = new List<double>(){ 3,5,10 };
            
// Set a summarization field.
parameters.SummarizationField = "TOTHH_CY";
            
// esriUnits.esriMiles is the default value for OutputUnits.
//parameters.OutputUnits = esriUnits.esriMiles;
            
thresholdRingsRadiiTask.ExecuteAsync(parameters, new AsyncResponder(resultHandler, faultHandler));