Opc.Ua.Server.SubscriptionManager.CreateMonitoredItems C# (CSharp) Method

        public void CreateMonitoredItems(
            OperationContext                        context,
            uint                                    subscriptionId, 
            TimestampsToReturn                      timestampsToReturn,
            MonitoredItemCreateRequestCollection    itemsToCreate, 
            out MonitoredItemCreateResultCollection results, 
            out DiagnosticInfoCollection            diagnosticInfos)
        {
            int monitoredItemCountIncrement = 0;
            
            // find subscription.
            Subscription subscription = null;

            lock (m_lock)
            {
                if (!m_subscriptions.TryGetValue(subscriptionId, out subscription))
                {
                    throw new ServiceResultException(StatusCodes.BadSubscriptionIdInvalid);
                }
            }

            int currentMonitoredItemCount = subscription.MonitoredItemCount;

            // create the items.
            subscription.CreateMonitoredItems(
                context,
                timestampsToReturn,
                itemsToCreate,
                out results,
                out diagnosticInfos);

            monitoredItemCountIncrement = subscription.MonitoredItemCount - currentMonitoredItemCount;
        
            // update diagnostics.
            if (context.Session != null)
            {
                lock (context.Session.DiagnosticsLock)
                {
                    SessionDiagnosticsDataType diagnostics = context.Session.SessionDiagnostics;
                    UpdateCurrentMonitoredItemsCount(diagnostics, monitoredItemCountIncrement);
                }
            }
        }