public void Close(int classId)
{
var origin = repository.Get(classId);
origin.Status = (int)ClassEnums.STATUS_CLOSED;
repository.Update(origin);
// update transcript status
var transcripts = transcriptRepository.GetTranscriptsOfClass(classId).ToList();
transcripts.ForEach(t =>
{
t.Status = (int)TranscriptEnums.STATUS_RESERVE;
});
transcriptRepository.UpdateTranscripts(transcripts);
}