BoxKite.Twitter.TwitterConnection.GetDirectMessages_Received_Failover C# (CSharp) Метод

        private async Task<long> GetDirectMessages_Received_Failover(long sinceid)
        {
            var largestseenid = sinceid;

            var dmrecd = await UserSession.GetDirectMessages(count: _pagingSize, sinceId: sinceid);
            if (!dmrecd.OK) return largestseenid;
            foreach (var dm in dmrecd.Where(dm => dm.Id > sinceid))
            {
                largestseenid = dm.Id;
                _directmessages.OnNext(dm);
             }
            return largestseenid;
        }