public List <SensorDataEntity> GetSensorHistory(string productName, string path, long n) { var history = _databaseWorker.GetSensorDataHistory(productName, path, n); history.Sort((a, b) => a.Time.CompareTo(b.Time)); if (n != -1 && n > 0) { history = history.TakeLast((int)n).ToList(); } return(history); }