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

        private async Task<long> GetSearchTimeLine_Backfill()
        {
            int backofftimer = 30;
            long smallestid = 0;
            long largestid = 0;
            int backfillQuota = 50;

            do
            {
                //TODO: need to unhardcode SearchResultType just for backfills
                var searchtl = await TwitterSession.SearchFor(searchText:_currentSearchText, searchResponseType:SearchResultType.Recent, count: _pagingSize, maxId: smallestid);
                if (searchtl.OK)
                {
                    smallestid = long.MaxValue;
                    if (searchtl.Tweets.Count() < backfillQuota) backfillQuota = searchtl.Tweets.Count();
                    foreach (var tweet in searchtl.Tweets)
                    {
                        if (tweet.Id < smallestid) smallestid = tweet.Id;
                        if (tweet.Id > largestid) largestid = tweet.Id;
                        _searchtimeline.OnNext(tweet);
                        backfillQuota--;
                    }
                }
                else
                {
                    // The Backoff will trigger 7 times before just giving up
                    // once at 30s, 60s, 1m, 2m, 4m, 8m and then 16m
                    // note that the last call into this will be 1m above the 15 "rate limit reset" window 
                    await Task.Delay(TimeSpan.FromSeconds(backofftimer));
                    if (backofftimer > _maxbackoff)
                    backofftimer = backofftimer * 2;
                }
            } while (backfillQuota > 0);
            return largestid;
        }