Opc.Ua.Com.Server.ComAeUtils.UpdateInstanceDescriptions C# (CSharp) Method

        private static void UpdateInstanceDescriptions(Session session, List<AeEventAttribute> instances, bool throwOnError)
        {
            try
            {
                ReadValueIdCollection nodesToRead = new ReadValueIdCollection();

                for (int ii = 0; ii < instances.Count; ii++)
                {
                    ReadValueId nodeToRead = new ReadValueId();
                    nodeToRead.NodeId = instances[ii].NodeId;
                    nodeToRead.AttributeId = Attributes.Description;
                    nodesToRead.Add(nodeToRead);

                    nodeToRead = new ReadValueId();
                    nodeToRead.NodeId = instances[ii].NodeId;
                    nodeToRead.AttributeId = Attributes.DataType;
                    nodesToRead.Add(nodeToRead);

                    nodeToRead = new ReadValueId();
                    nodeToRead.NodeId = instances[ii].NodeId;
                    nodeToRead.AttributeId = Attributes.ValueRank;
                    nodesToRead.Add(nodeToRead);
                }

                // start the browse operation.
                DataValueCollection results = null;
                DiagnosticInfoCollection diagnosticInfos = null;

                session.Read(
                    null,
                    0,
                    TimestampsToReturn.Neither,
                    nodesToRead,
                    out results,
                    out diagnosticInfos);

                ClientBase.ValidateResponse(results, nodesToRead);
                ClientBase.ValidateDiagnosticInfos(diagnosticInfos, nodesToRead);

                // update the instances.
                for (int ii = 0; ii < nodesToRead.Count; ii += 3)
                {
                    AeEventAttribute instance = instances[ii / 3];

                    instance.Description = results[ii].GetValue<LocalizedText>(LocalizedText.Null).Text;
                    instance.DataType = results[ii+1].GetValue<NodeId>(NodeId.Null);
                    instance.ValueRank = results[ii+2].GetValue<int>(ValueRanks.Any);
                    
                    if (!NodeId.IsNull(instance.DataType))
                    {
                        instance.BuiltInType = DataTypes.GetBuiltInType(instance.DataType, session.TypeTree);
                    }
                }
            }
            catch (Exception exception)
            {
                if (throwOnError)
                {
                    throw new ServiceResultException(exception, StatusCodes.BadUnexpectedError);
                }
            }
        }
    }