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

        public void ConditionRefresh(OperationContext context, uint subscriptionId)
        {
            Subscription subscription = null;

            lock (m_lock)
            {           
                if (!m_subscriptions.TryGetValue(subscriptionId, out subscription))
                {
                    throw ServiceResultException.Create(
                        StatusCodes.BadSubscriptionIdInvalid,
                        "Cannot refresh conditions for a subscription that does not exist.");
                }
            }

            // ensure a condition refresh is allowed.
            subscription.ValidateConditionRefresh(context);

            // do the actual refresh in the background.
            ThreadPool.QueueUserWorkItem(DoConditionRefresh, subscription);
        }