AverageDriveTimeReportParameters parameters = new AverageDriveTimeReportParameters();
            
// The Boundaries type could take either data as
// ESRI.ArcGIS.Client.Tasks.FeatureSet, ESRI.ArcGIS.Client.BAServer.FolderItem, 
// or ESRI.ArcGIS.Client.BACore.StandardLayer.
            
// Set Boundaries with a valid data type.
// It is recommended that the average drive time report be run using customer derived trade areas.
parameters.Boundaries = boundaries;
            
// Set an attribute field name which describes every trade area in the Boundaries layer.
parameters.AreaDescField = "AREA_DESC";
            
// DriveTimeUnits.esriMiles is the default value for DistanceUnits.
//parameters.DistanceUnits = DriveTimeUnits.esriMiles;
            
// The origins for average drive time calculations are either geographic centers of trade areas
// or actual store points. In the last case, you should also specify the Stores and AreaLinkField
// parameters and can specify the optional StoreIDField parameter.
//parameters.Stores = stores;
//parameters.AreaLinkField = "STORE_ID";
            
// Set report parameters. 
parameters.StandardReportOptions = new ReportOptions("PDF");
            
averageDriveTimeReportTask.ExecuteAsync(parameters, new AsyncResponder(resultHandler, faultHandler));