public async Task <ActionResult> Get(CancellationToken cancellationToken) { var streams = await _svc.ReadEventStreamsAsync(null, cancellationToken : cancellationToken); var lst = new List <Aggregate <TAggregate> >(); foreach (var es in streams) { var m = new Aggregate <TAggregate>(_svc, es.StreamId); await m.BuildAsync(true, cancellationToken); lst.Add(m); } return(Ok(lst.ToList())); }