private async Task <Guid> CreateRunTrace() { ScheduleTraceEntity entity = new ScheduleTraceEntity(); entity.TraceId = Guid.NewGuid(); entity.ScheduleId = _sid; entity.Node = node; entity.StartTime = DateTime.Now; entity.Result = (int)ScheduleRunResult.Null; _db.ScheduleTraces.Add(entity); if (await _db.SaveChangesAsync() > 0) { return(entity.TraceId); } return(Guid.Empty); }