public void AppendEventsToStream(string streamId, long streamVersion, ICollection <object> events) { if (events.Count == 0) { return; } try { _store.AppendToStore(streamId, MessageAttribute.Empty, streamVersion, events); } catch (AppendOnlyStoreConcurrencyException e) { // load server events var server = LoadEventStream(streamId); // throw a real problem throw OptimisticConcurrencyException.Create(server.StreamVersion, e.ExpectedStreamVersion, streamId, server.Events); } }