title: How can I use the cancellation token Azure Service Bus (SubscriptionClient)
body: <p>Regarding the cancellation token, how does one use it to cancel a message?
  If I do not complete the message, does it get cancelled automatically (e.g. retried later when there is a connection)?
  Do I need to abandon it?
  Is the cancellation token only on the SubscriptionClient?</p>
  
  <p>For example when I close the connection with CloseAsync(), cancellationToken.IsCancellationRequested is triggered.</p>
  
  <p>Is that the only use of the cancellation token. A little light on how one can use the cancellation token would be very helpful.</p>