AgGateway.ADAPT.ISOv4Plugin.Writers.PrescriptionWriter.WriteTreatmentZones C# (CSharp) Method

        private TreatmentZone WriteTreatmentZones(XmlWriter writer, RasterGridPrescription prescription)
        {
            if (prescription.ProductIds == null)
                return null;

            var lossOfSignalTreatmentZone = new TreatmentZone { Name = "Loss of GPS", Variables = new List<DataVariable>() };
            var outOfFieldTreatmentZone = new TreatmentZone { Name = "Out of Field", Variables = new List<DataVariable>() };
            var defaultTreatmentZone = new TreatmentZone { Name = "Default", Variables = new List<DataVariable>() };

            var defaultRate = new NumericRepresentationValue(null, new NumericValue(prescription.RxProductLookups.First().UnitOfMeasure, 0));
            var isoUnit = DetermineIsoUnit(prescription.RxProductLookups.First().UnitOfMeasure);

            foreach (var productId in prescription.ProductIds)
            {
                var isoProductId = TaskWriter.Products.FindById(productId) ?? TaskWriter.CropVarieties.FindById(productId);

                AddDataVariable(lossOfSignalTreatmentZone, prescription.LossOfGpsRate, isoProductId, isoUnit);
                AddDataVariable(outOfFieldTreatmentZone, prescription.OutOfFieldRate, isoProductId, isoUnit);
                AddDataVariable(defaultTreatmentZone, defaultRate, isoProductId, isoUnit);
            }

            var lossOfSignalZoneId = "253";
            if (lossOfSignalTreatmentZone.Variables.Count > 0)
                writer.WriteXmlAttribute("I", lossOfSignalZoneId);

            var outOfFieldZoneId = "254";
            if (outOfFieldTreatmentZone.Variables.Count > 0)
                writer.WriteXmlAttribute("J", outOfFieldZoneId);

            TreatmentZoneWriter.Write(writer, "1", defaultTreatmentZone);
            if (lossOfSignalTreatmentZone.Variables.Count > 0)
                TreatmentZoneWriter.Write(writer, lossOfSignalZoneId, lossOfSignalTreatmentZone);
            if (outOfFieldTreatmentZone.Variables.Count > 0)
                TreatmentZoneWriter.Write(writer, outOfFieldZoneId, outOfFieldTreatmentZone);

            return defaultTreatmentZone;
        }