Opc.Ua.Server.Subscription.ValidateConditionRefresh C# (CSharp) Method

        public void ValidateConditionRefresh(OperationContext context)
        {
            lock (m_lock)
            {  
                VerifySession(context);

                if (m_refreshInProgress)
                {
                    throw new ServiceResultException(StatusCodes.BadRefreshInProgress);
                }
            }
        }