title: .NetCore Azure Servicebus get current message count
body: <p>The old method of getting count from Queue was like this:</p>
  
  <pre><code> CloudQueue q = queueClient.GetQueueReference(QUEUE_NAME);
              q.FetchAttributes();
              qCnt = q.ApproximateMessageCount;
  </code></pre>
  
  <p>This no longer works with .netCore with AMQP 1.0</p>
  
  <p>I am not finding a good way to get a message count. Any ideas on what I am missing ?</p>