private async Task <SubscriptionClient> GetSubscriptionClient()
        {
            if (_subscriptionClient != null)
            {
                return(_subscriptionClient);
            }

            _subscriptionClient = await _queueManager.CreateSubscriptionReceiver(_topicPath, _subscriptionName, _filterCondition);

            _subscriptionClient.PrefetchCount = ConcurrentHandlerLimit;
            return(_subscriptionClient);
        }