private async Task <IEnumerable <Sensordata> > GetSensordatas() { var sensordatas = await _storage.GetSensordata(FILENAME); if (sensordatas == null) { await _storage.SaveSensorData(new Sensordata[] { new Sensordata { Id = 1, SensorId = "Deursensor", KlantId = "Frank", Value = "prioriteit", Timestamp = "10:00:00", Active = true }, new Sensordata { Id = 2, SensorId = "Deursensor", KlantId = "Frank", Value = "prioriteit", Timestamp = "10:01:00", Active = false }, new Sensordata { Id = 1, SensorId = "Medicatiesensor", KlantId = "Frank", Value = "prioriteit", Timestamp = "10:50:00", Active = true } } , FILENAME); } return(sensordatas); }