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

        public void DeleteSubscriptions(
            OperationContext             context,
            UInt32Collection             subscriptionIds,
            out StatusCodeCollection     results,
            out DiagnosticInfoCollection diagnosticInfos)
        {
            bool diagnosticsExist = false;
            results = new StatusCodeCollection(subscriptionIds.Count);
            diagnosticInfos = new DiagnosticInfoCollection(subscriptionIds.Count);

            foreach (uint subscriptionId in subscriptionIds)
            {
                try
                {
                    StatusCode result = DeleteSubscription(context, subscriptionId);
                    results.Add(result);
                    
                    if ((context.DiagnosticsMask & DiagnosticsMasks.OperationAll) != 0)
                    {
                        diagnosticInfos.Add(null);
                    }
                }
                catch (Exception e)
                {
                    ServiceResult result = ServiceResult.Create(e, StatusCodes.BadUnexpectedError, String.Empty);
                    results.Add(result.Code);

                    if ((context.DiagnosticsMask & DiagnosticsMasks.OperationAll) != 0)
                    {
                        DiagnosticInfo diagnosticInfo = ServerUtils.CreateDiagnosticInfo(m_server, context, result);
                        diagnosticInfos.Add(diagnosticInfo);
                        diagnosticsExist = true;
                    }
                }
            }

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