public async Task <Series> GetSeriesAsync(string tvdbId, int seriesNumber, int episodeNumber, bool forceRefresh)
{
var foundSeries = await _seriesCache.GetOrAddAsync(tvdbId, async s =>
{
var series = await _tvdbConnection.GetSeriesAsync(s);
return((series == null || series.GetEpisode(seriesNumber, episodeNumber) == null) ? null : series);
}, forceRefresh);
if (foundSeries == null || foundSeries.GetEpisode(seriesNumber, episodeNumber) == null)
{
_seriesCache.MarkAsFailed(tvdbId);
return(null);
}
return(foundSeries);
}