Opc.Ua.Server.SessionPublishQueue.Acknowledge C# (CSharp) Method

        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();
                }
            }
        }