Question

Given this pseudo-code, what I’d like to do is ensure that if I have multiple subscribers, I’m not going to saturate my remote source with extra polling for each subscriber.

IObservable<data> RemoteObservable(Remote remote) 
{
   var onceonly = Observable.FromAsyncPattern(remote.Begin, remote.End);
   return Observable.Defer(() => onceonly())
                    .Repeat();
}

Answer 1

The answer is RefCount, (found here):

   return Observable.Defer(() => onceonly())
                    .Repeat()
                    .Publish()
                    .RefCount();