private bool SetupNotification(int attemptsCount, string tableName, NotificationEventHandler changeEventHandler)
        {
            bool               result = false;
            string             key    = NotificationClient.GetKey(tableName, changeEventHandler);
            NotificationClient notificationClient;

            while (!_NotificationClients.TryGetValue(key, out notificationClient))
            {
                notificationClient = new NotificationClient()
                {
                    TableName = tableName, EventHandler = changeEventHandler
                };
                if (AddNotificationClient(notificationClient))
                {
                    break;
                }
            }
            result = SetupNotification(notificationClient, attemptsCount);
            if (!result)
            {
                AddNotificationToRepair(notificationClient);
            }
            return(result);
        }