/// <summary>
        /// Invokes the TranslateBrowsePathsToNodeIds service.
        /// </summary>
        /// <param name="requestHeader">The request header.</param>
        /// <param name="browsePaths">The list of browse paths for which NodeIds are being requested.</param>
        /// <param name="results">The list of results for the list of browse paths.</param>
        /// <param name="diagnosticInfos">The diagnostic information for the results.</param>
        /// <returns>
        /// Returns a <see cref="ResponseHeader"/> object
        /// </returns>
        public override ResponseHeader TranslateBrowsePathsToNodeIds(
            RequestHeader                  requestHeader, 
            BrowsePathCollection           browsePaths, 
            out BrowsePathResultCollection results, 
            out DiagnosticInfoCollection   diagnosticInfos)
        {
            results = null;
            diagnosticInfos = null;

            OperationContext context = ValidateRequest(requestHeader, RequestType.TranslateBrowsePathsToNodeIds);

            try
            {
                if (browsePaths == null || browsePaths.Count == 0)
                {
                    throw new ServiceResultException(StatusCodes.BadNothingToDo);
                }

                m_serverInternal.NodeManager.TranslateBrowsePathsToNodeIds(
                    context,
                    browsePaths,
                    out results,
                    out diagnosticInfos);

                return CreateResponse(requestHeader, context.StringTable);  
            }
            catch (ServiceResultException e)
            {
                lock (ServerInternal.DiagnosticsLock)
                {
                    ServerInternal.ServerDiagnostics.RejectedRequestsCount++;

                    if (IsSecurityError(e.StatusCode))
                    {
                        ServerInternal.ServerDiagnostics.SecurityRejectedRequestsCount++;
                    }
                }

                throw TranslateException(context, e);
            }  
            finally
            {
                OnRequestComplete(context);
            } 
        }

		/// <summary>
		/// Modifies monitored items in a subscription.
		/// </summary>
		public void ModifyMonitoredItems(
			OperationContext                        context,
			TimestampsToReturn                      timestampsToReturn,
			MonitoredItemModifyRequestCollection    itemsToModify,
			out MonitoredItemModifyResultCollection results,
            out DiagnosticInfoCollection            diagnosticInfos)
        {
            if (context == null)       throw new ArgumentNullException("context");
            if (itemsToModify == null) throw new ArgumentNullException("itemsToModify");

            int count = itemsToModify.Count;

            // allocate results.
            bool diagnosticsExist = false;
            results = new MonitoredItemModifyResultCollection(count);
            diagnosticInfos = null;
            
            if ((context.DiagnosticsMask & DiagnosticsMasks.OperationAll) != 0)
            {
                diagnosticInfos = new DiagnosticInfoCollection(count);
            }
            
            // build list of items to modify.
            List<IMonitoredItem> monitoredItems = new List<IMonitoredItem>(count);
            List<ServiceResult> errors = new List<ServiceResult>(count);
            List<MonitoringFilterResult> filterResults = new List<MonitoringFilterResult>(count);
            double[] originalSamplingIntervals = new double[count];

            bool validItems = false;

            lock (m_lock)
            {
                // check session.
                VerifySession(context);

                // clear lifetime counter.
                ResetLifetimeCount();

                for (int ii = 0; ii < count; ii++)
                {
                    filterResults.Add(null);

                    LinkedListNode<IMonitoredItem> node = null;

                    if (!m_monitoredItems.TryGetValue(itemsToModify[ii].MonitoredItemId, out node))
                    {
                        monitoredItems.Add(null);
                        errors.Add(StatusCodes.BadMonitoredItemIdInvalid);

                        // update diagnostics.
                        if ((context.DiagnosticsMask & DiagnosticsMasks.OperationAll) != 0)
                        {
                            DiagnosticInfo diagnosticInfo = ServerUtils.CreateDiagnosticInfo(m_server, context, errors[ii]);
                            diagnosticsExist = true;
                            diagnosticInfos.Add(diagnosticInfo);
                        }

                        continue;
                    }
                    
                    IMonitoredItem monitoredItem = node.Value;
                    monitoredItems.Add(monitoredItem);
                    originalSamplingIntervals[ii] = monitoredItem.SamplingInterval;

                    errors.Add(null);
                    validItems = true;

                    // update diagnostics.
                    if ((context.DiagnosticsMask & DiagnosticsMasks.OperationAll) != 0)
                    {
                        diagnosticInfos.Add(null);
                    }
                }
            }
                
             // update items.
            if (validItems)
            {
                m_server.NodeManager.ModifyMonitoredItems(
                    context,
                    timestampsToReturn,
                    monitoredItems,
                    itemsToModify,
                    errors,
                    filterResults);
            }
                   
            lock (m_lock)
            {             
                // create results.
                for (int ii = 0; ii < errors.Count; ii++)
                {
                    ServiceResult error = errors[ii];

                    MonitoredItemModifyResult result = null;

                    if (ServiceResult.IsGood(error))
//.........这里部分代码省略.........

		/// <summary>
		/// Deletes the monitored items in a subscription.
		/// </summary>
		private void DeleteMonitoredItems(
			OperationContext             context,
            UInt32Collection             monitoredItemIds,
            bool                         doNotCheckSession,
            out StatusCodeCollection     results,
            out DiagnosticInfoCollection diagnosticInfos)
        {
            if (context == null)          throw new ArgumentNullException("context");
            if (monitoredItemIds == null) throw new ArgumentNullException("monitoredItemIds");

            int count = monitoredItemIds.Count;

            bool diagnosticsExist = false;
            results = new StatusCodeCollection(count);
            diagnosticInfos = null;

            if ((context.DiagnosticsMask & DiagnosticsMasks.OperationAll) != 0)
            {
                diagnosticInfos = new DiagnosticInfoCollection(count);
            }
            
            // build list of items to modify.
            List<IMonitoredItem> monitoredItems = new List<IMonitoredItem>(count);
            List<ServiceResult> errors = new List<ServiceResult>(count);
            double[] originalSamplingIntervals = new double[count];
            MonitoringMode[] originalMonitoringModes = new MonitoringMode[count];

            bool validItems = false;

            lock (m_lock)
            {
                // check session.
                if (!doNotCheckSession)
                {
                    VerifySession(context);
                }

                // clear lifetime counter.
                ResetLifetimeCount();
                
                for (int ii = 0; ii < count; ii++)
                {
                    LinkedListNode<IMonitoredItem> node = null;

                    if (!m_monitoredItems.TryGetValue(monitoredItemIds[ii], out node))
                    {
                        monitoredItems.Add(null);
                        errors.Add(StatusCodes.BadMonitoredItemIdInvalid);

                        // update diagnostics.
                        if ((context.DiagnosticsMask & DiagnosticsMasks.OperationAll) != 0)
                        {
                            DiagnosticInfo diagnosticInfo = ServerUtils.CreateDiagnosticInfo(m_server, context, errors[ii]);
                            diagnosticsExist = true;
                            diagnosticInfos.Add(diagnosticInfo);
                        }

                        continue;
                    }
                    
                    IMonitoredItem monitoredItem = node.Value;
                    monitoredItems.Add(monitoredItem);

                    // remove the item from the internal lists.
                    m_monitoredItems.Remove(monitoredItemIds[ii]);
                    m_itemsToTrigger.Remove(monitoredItemIds[ii]);

                    //remove the links towards the deleted monitored item
                    List<ITriggeredMonitoredItem> triggeredItems = null;
                    foreach (KeyValuePair<uint, List<ITriggeredMonitoredItem>> item in m_itemsToTrigger)
                    {
                        triggeredItems = item.Value;
                        for (int jj = 0; jj < triggeredItems.Count; jj++)
                        {
                            if (triggeredItems[jj].Id == monitoredItemIds[ii])
                            {
                                triggeredItems.RemoveAt(jj);
                                break;
                            }
                        }
                    }
                    
                    if (node.List != null)
                    {
                        node.List.Remove(node);
                    }

                    originalSamplingIntervals[ii] = monitoredItem.SamplingInterval;
                    originalMonitoringModes[ii] = monitoredItem.MonitoringMode;

                    errors.Add(null);
                    validItems = true;

                    // update diagnostics.
                    if ((context.DiagnosticsMask & DiagnosticsMasks.OperationAll) != 0)
                    {
                        diagnosticInfos.Add(null);
//.........这里部分代码省略.........

        /// <summary>
        /// Processes acknowledgements for previously published messages.
        /// </summary>
        public void Acknowledge(
            OperationContext                      context,
            SubscriptionAcknowledgementCollection subscriptionAcknowledgements, 
            out StatusCodeCollection              acknowledgeResults, 
            out DiagnosticInfoCollection          acknowledgeDiagnosticInfos)
        {
            if (context == null) throw new ArgumentNullException("context");
            if (subscriptionAcknowledgements == null) throw new ArgumentNullException("subscriptionAcknowledgements");

            lock (m_lock)
            {                
                bool diagnosticsExist = false;
                acknowledgeResults = new StatusCodeCollection(subscriptionAcknowledgements.Count);
                acknowledgeDiagnosticInfos = new DiagnosticInfoCollection(subscriptionAcknowledgements.Count);

                for (int ii = 0; ii < subscriptionAcknowledgements.Count; ii++)
                {
                    SubscriptionAcknowledgement acknowledgement = subscriptionAcknowledgements[ii];

                    bool found = false;
                    
                    for (int jj = 0; jj < m_queuedSubscriptions.Count; jj++)
                    {
                        QueuedSubscription subscription = m_queuedSubscriptions[jj];

                        if (subscription.Subscription.Id == acknowledgement.SubscriptionId)
                        {
                            ServiceResult result = subscription.Subscription.Acknowledge(context, acknowledgement.SequenceNumber);

                            if (ServiceResult.IsGood(result))
                            {
                                acknowledgeResults.Add(StatusCodes.Good);
                                
                                if ((context.DiagnosticsMask & DiagnosticsMasks.OperationAll) != 0)
                                {
                                    acknowledgeDiagnosticInfos.Add(null);
                                }
                            }
                            else
                            {
                                acknowledgeResults.Add(result.Code);
                                
                                if ((context.DiagnosticsMask & DiagnosticsMasks.OperationAll) != 0)
                                {                                    
                                    DiagnosticInfo diagnosticInfo = ServerUtils.CreateDiagnosticInfo(m_server, context, result);
                                    acknowledgeDiagnosticInfos.Add(diagnosticInfo);
                                    diagnosticsExist = true;
                                }
                            }

                            found = true;
                            break;
                        }
                    }

                    if (!found)
                    {
                        ServiceResult result = new ServiceResult(StatusCodes.BadSubscriptionIdInvalid);
                        acknowledgeResults.Add(result.Code);
                        
                        if ((context.DiagnosticsMask & DiagnosticsMasks.OperationAll) != 0)
                        {
                            DiagnosticInfo diagnosticInfo = ServerUtils.CreateDiagnosticInfo(m_server, context, result);
                            acknowledgeDiagnosticInfos.Add(diagnosticInfo);
                            diagnosticsExist = true;
                        }
                    }
                }

                if (!diagnosticsExist)
                {
                    acknowledgeDiagnosticInfos.Clear();
                }
            }
        }

        /// <summary>
        /// Updates the triggers for the monitored item.
        /// </summary>
        public void SetTriggering(
            OperationContext context,
            uint triggeringItemId,
            UInt32Collection linksToAdd,
            UInt32Collection linksToRemove,
            out StatusCodeCollection addResults,
            out DiagnosticInfoCollection addDiagnosticInfos,
            out StatusCodeCollection removeResults,
            out DiagnosticInfoCollection removeDiagnosticInfos)
        {
            if (context == null) throw new ArgumentNullException("context");
            if (linksToAdd == null) throw new ArgumentNullException("linksToAdd");
            if (linksToRemove == null) throw new ArgumentNullException("linksToRemove");

            // allocate results.
            bool diagnosticsExist = false;
            addResults = new StatusCodeCollection();
            addDiagnosticInfos = null;
            removeResults = new StatusCodeCollection();
            removeDiagnosticInfos = null;

            if ((context.DiagnosticsMask & DiagnosticsMasks.OperationAll) != 0)
            {
                addDiagnosticInfos = new DiagnosticInfoCollection();
                removeDiagnosticInfos = new DiagnosticInfoCollection();
            }

            // build list of items to modify.
            lock (m_lock)
            {
                // check session.
                VerifySession(context);

                // clear lifetime counter.
                ResetLifetimeCount();

                // look up triggering item.
                LinkedListNode<IMonitoredItem> triggerNode = null;

                if (!m_monitoredItems.TryGetValue(triggeringItemId, out triggerNode))
                {
                    throw new ServiceResultException(StatusCodes.BadMonitoredItemIdInvalid);
                }

                // lookup existing list.
                List<ITriggeredMonitoredItem> triggeredItems = null;

                if (!m_itemsToTrigger.TryGetValue(triggeringItemId, out triggeredItems))
                {
                    m_itemsToTrigger[triggeringItemId] = triggeredItems = new List<ITriggeredMonitoredItem>();
                }

                // remove old links.
                for (int ii = 0; ii < linksToRemove.Count; ii++)
                {
                    removeResults.Add(StatusCodes.Good);

                    bool found = false;

                    for (int jj = 0; jj < triggeredItems.Count; jj++)
                    {
                        if (triggeredItems[jj].Id == linksToRemove[ii])
                        {
                            found = true;
                            triggeredItems.RemoveAt(jj);
                            break;
                        }
                    }

                    if (!found)
                    {
                        removeResults[ii] = StatusCodes.BadMonitoredItemIdInvalid;

                        // update diagnostics.
                        if ((context.DiagnosticsMask & DiagnosticsMasks.OperationAll) != 0)
                        {
                            DiagnosticInfo diagnosticInfo = ServerUtils.CreateDiagnosticInfo(m_server, context, removeResults[ii]);
                            diagnosticsExist = true;
                            removeDiagnosticInfos.Add(diagnosticInfo);
                        }

                        continue;
                    }

                    // update diagnostics.
                    if ((context.DiagnosticsMask & DiagnosticsMasks.OperationAll) != 0)
                    {
                        removeDiagnosticInfos.Add(null);
                    }
                }

                // add new links.
                for (int ii = 0; ii < linksToAdd.Count; ii++)
                {
                    addResults.Add(StatusCodes.Good);

                    LinkedListNode<IMonitoredItem> node = null;
//.........这里部分代码省略.........

        /// <summary>
        /// Invokes the Read service.
        /// </summary>
        public virtual ResponseHeader Read(
            RequestHeader                requestHeader,
            double                       maxAge,
            TimestampsToReturn           timestampsToReturn,
            ReadValueIdCollection        nodesToRead,
            out DataValueCollection      results,
            out DiagnosticInfoCollection diagnosticInfos)
        {
            results = null;
            diagnosticInfos = null;

            ValidateRequest(requestHeader);

            // Insert implementation.

            return CreateResponse(requestHeader, StatusCodes.BadServiceUnsupported);
        }

        /// <summary>
        /// Invokes the Write service.
        /// </summary>
        public virtual ResponseHeader Write(
            RequestHeader                requestHeader,
            WriteValueCollection         nodesToWrite,
            out StatusCodeCollection     results,
            out DiagnosticInfoCollection diagnosticInfos)
        {
            results = null;
            diagnosticInfos = null;

            ValidateRequest(requestHeader);

            // Insert implementation.

            return CreateResponse(requestHeader, StatusCodes.BadServiceUnsupported);
        }

        /// <summary>
        /// Invokes the SetTriggering service.
        /// </summary>
        public virtual ResponseHeader SetTriggering(
            RequestHeader                requestHeader,
            uint                         subscriptionId,
            uint                         triggeringItemId,
            UInt32Collection             linksToAdd,
            UInt32Collection             linksToRemove,
            out StatusCodeCollection     addResults,
            out DiagnosticInfoCollection addDiagnosticInfos,
            out StatusCodeCollection     removeResults,
            out DiagnosticInfoCollection removeDiagnosticInfos)
        {
            addResults = null;
            addDiagnosticInfos = null;
            removeResults = null;
            removeDiagnosticInfos = null;

            ValidateRequest(requestHeader);

            // Insert implementation.

            return CreateResponse(requestHeader, StatusCodes.BadServiceUnsupported);
        }

        /// <summary>
        /// Invokes the Publish service.
        /// </summary>
        public virtual ResponseHeader Publish(
            RequestHeader                         requestHeader,
            SubscriptionAcknowledgementCollection subscriptionAcknowledgements,
            out uint                              subscriptionId,
            out UInt32Collection                  availableSequenceNumbers,
            out bool                              moreNotifications,
            out NotificationMessage               notificationMessage,
            out StatusCodeCollection              results,
            out DiagnosticInfoCollection          diagnosticInfos)
        {
            subscriptionId = 0;
            availableSequenceNumbers = null;
            moreNotifications = false;
            notificationMessage = null;
            results = null;
            diagnosticInfos = null;

            ValidateRequest(requestHeader);

            // Insert implementation.

            return CreateResponse(requestHeader, StatusCodes.BadServiceUnsupported);
        }

        /// <summary>
        /// Invokes the ModifyMonitoredItems service.
        /// </summary>
        public virtual ResponseHeader ModifyMonitoredItems(
            RequestHeader                           requestHeader,
            uint                                    subscriptionId,
            TimestampsToReturn                      timestampsToReturn,
            MonitoredItemModifyRequestCollection    itemsToModify,
            out MonitoredItemModifyResultCollection results,
            out DiagnosticInfoCollection            diagnosticInfos)
        {
            results = null;
            diagnosticInfos = null;

            ValidateRequest(requestHeader);

            // Insert implementation.

            return CreateResponse(requestHeader, StatusCodes.BadServiceUnsupported);
        }

        /// <summary>
        /// Invokes the SetMonitoringMode service.
        /// </summary>
        public virtual ResponseHeader SetMonitoringMode(
            RequestHeader                requestHeader,
            uint                         subscriptionId,
            MonitoringMode               monitoringMode,
            UInt32Collection             monitoredItemIds,
            out StatusCodeCollection     results,
            out DiagnosticInfoCollection diagnosticInfos)
        {
            results = null;
            diagnosticInfos = null;

            ValidateRequest(requestHeader);

            // Insert implementation.

            return CreateResponse(requestHeader, StatusCodes.BadServiceUnsupported);
        }

        /// <summary>
        /// Invokes the Call service.
        /// </summary>
        public virtual ResponseHeader Call(
            RequestHeader                  requestHeader,
            CallMethodRequestCollection    methodsToCall,
            out CallMethodResultCollection results,
            out DiagnosticInfoCollection   diagnosticInfos)
        {
            results = null;
            diagnosticInfos = null;

            ValidateRequest(requestHeader);

            // Insert implementation.

            return CreateResponse(requestHeader, StatusCodes.BadServiceUnsupported);
        }

        /// <summary>
        /// Reads an DiagnosticInfo array from the stream.
        /// </summary>
        public DiagnosticInfoCollection ReadDiagnosticInfoArray(string fieldName)
        {
            bool isNil = false;

            DiagnosticInfoCollection values = new DiagnosticInfoCollection();
                                    
            if (BeginField(fieldName, true, out isNil))
            {                                
                PushNamespace(Namespaces.OpcUaXsd);
                
                while (MoveToElement("DiagnosticInfo"))
                {
                    values.Add(ReadDiagnosticInfo("DiagnosticInfo"));
                }

                // check the length.
                if (m_context.MaxArrayLength > 0 && m_context.MaxArrayLength < values.Count)
                {
                    throw new ServiceResultException(StatusCodes.BadEncodingLimitsExceeded);
                }

                PopNamespace();

                EndField(fieldName);
                return values;
            }

            if (isNil)
            {
                return null;
            }

            return values;
        }

        /// <summary>
        /// Invokes the Read service.
        /// </summary>
        /// <param name="requestHeader">The request header.</param>
        /// <param name="maxAge">The Maximum age of the value to be read in milliseconds.</param>
        /// <param name="timestampsToReturn">The type of timestamps to be returned for the requested Variables.</param>
        /// <param name="nodesToRead">The list of Nodes and their Attributes to read.</param>
        /// <param name="results">The list of returned Attribute values</param>
        /// <param name="diagnosticInfos">The diagnostic information for the results.</param>
        /// <returns>
        /// Returns a <see cref="ResponseHeader"/> object
        /// </returns>
        public override ResponseHeader Read(
            RequestHeader                requestHeader, 
            double                       maxAge, 
            TimestampsToReturn           timestampsToReturn, 
            ReadValueIdCollection        nodesToRead, 
            out DataValueCollection      results, 
            out DiagnosticInfoCollection diagnosticInfos)
        {
            OperationContext context = ValidateRequest(requestHeader, RequestType.Read);

            try
            {
                if (nodesToRead == null || nodesToRead.Count == 0)
                {
                    throw new ServiceResultException(StatusCodes.BadNothingToDo);
                }

                m_serverInternal.NodeManager.Read(
                    context,
                    maxAge,
                    timestampsToReturn,
                    nodesToRead,
                    out results,
                    out diagnosticInfos);

                return CreateResponse(requestHeader, context.StringTable);  
            }
            catch (ServiceResultException e)
            {
                lock (ServerInternal.DiagnosticsLock)
                {
                    ServerInternal.ServerDiagnostics.RejectedRequestsCount++;

                    if (IsSecurityError(e.StatusCode))
                    {
                        ServerInternal.ServerDiagnostics.SecurityRejectedRequestsCount++;
                    }
                }

                throw TranslateException(context, e);
            }  
            finally
            {
                OnRequestComplete(context);
            } 
        }

        /// <summary>
        /// Invokes the TranslateBrowsePathsToNodeIds service.
        /// </summary>
        public virtual ResponseHeader TranslateBrowsePathsToNodeIds(
            RequestHeader                  requestHeader,
            BrowsePathCollection           browsePaths,
            out BrowsePathResultCollection results,
            out DiagnosticInfoCollection   diagnosticInfos)
        {
            results = null;
            diagnosticInfos = null;

            ValidateRequest(requestHeader);

            // Insert implementation.

            return CreateResponse(requestHeader, StatusCodes.BadServiceUnsupported);
        }

        /// <summary>
        /// Invokes the DeleteSubscriptions service.
        /// </summary>
        public virtual ResponseHeader DeleteSubscriptions(
            RequestHeader                requestHeader,
            UInt32Collection             subscriptionIds,
            out StatusCodeCollection     results,
            out DiagnosticInfoCollection diagnosticInfos)
        {
            results = null;
            diagnosticInfos = null;

            ValidateRequest(requestHeader);

            // Insert implementation.

            return CreateResponse(requestHeader, StatusCodes.BadServiceUnsupported);
        }

        /// <summary>
        /// Invokes the QueryFirst service.
        /// </summary>
        public virtual ResponseHeader QueryFirst(
            RequestHeader                 requestHeader,
            ViewDescription               view,
            NodeTypeDescriptionCollection nodeTypes,
            ContentFilter                 filter,
            uint                          maxDataSetsToReturn,
            uint                          maxReferencesToReturn,
            out QueryDataSetCollection    queryDataSets,
            out byte[]                    continuationPoint,
            out ParsingResultCollection   parsingResults,
            out DiagnosticInfoCollection  diagnosticInfos,
            out ContentFilterResult       filterResult)
        {
            queryDataSets = null;
            continuationPoint = null;
            parsingResults = null;
            diagnosticInfos = null;
            filterResult = null;

            ValidateRequest(requestHeader);

            // Insert implementation.

            return CreateResponse(requestHeader, StatusCodes.BadServiceUnsupported);
        }

        /// <summary>
        /// Invokes the RegisterServer2 service.
        /// </summary>
        public virtual ResponseHeader RegisterServer2(
            RequestHeader                requestHeader,
            RegisteredServer             server,
            ExtensionObjectCollection    discoveryConfiguration,
            out StatusCodeCollection     configurationResults,
            out DiagnosticInfoCollection diagnosticInfos)
        {
            configurationResults = null;
            diagnosticInfos = null;

            ValidateRequest(requestHeader);

            // Insert implementation.

            return CreateResponse(requestHeader, StatusCodes.BadServiceUnsupported);
        }

        /// <summary>
        /// Invokes the HistoryRead service.
        /// </summary>
        public virtual ResponseHeader HistoryRead(
            RequestHeader                   requestHeader,
            ExtensionObject                 historyReadDetails,
            TimestampsToReturn              timestampsToReturn,
            bool                            releaseContinuationPoints,
            HistoryReadValueIdCollection    nodesToRead,
            out HistoryReadResultCollection results,
            out DiagnosticInfoCollection    diagnosticInfos)
        {
            results = null;
            diagnosticInfos = null;

            ValidateRequest(requestHeader);

            // Insert implementation.

            return CreateResponse(requestHeader, StatusCodes.BadServiceUnsupported);
        }

        /// <summary>
        /// Invokes the ActivateSession service.
        /// </summary>
        public virtual ResponseHeader ActivateSession(
            RequestHeader                       requestHeader,
            SignatureData                       clientSignature,
            SignedSoftwareCertificateCollection clientSoftwareCertificates,
            StringCollection                    localeIds,
            ExtensionObject                     userIdentityToken,
            SignatureData                       userTokenSignature,
            out byte[]                          serverNonce,
            out StatusCodeCollection            results,
            out DiagnosticInfoCollection        diagnosticInfos)
        {
            serverNonce = null;
            results = null;
            diagnosticInfos = null;

            ValidateRequest(requestHeader);

            // Insert implementation.

            return CreateResponse(requestHeader, StatusCodes.BadServiceUnsupported);
        }