问WCF ado.net插入记录(末尾)

EN

private MeasurementEntities Context;
Context = new MeasurementEntities(new Uri("http://192.168.11.240:85/NFCDataService.svc/"));

public void SaveAnwsersToDbLocal(bool ans1, bool ans2, bool ans3)
        {
            Measurement temp = new Measurement();

            temp.Anwser1 = ans1;
            temp.Anwser2 = ans2;
            temp.Anwser3 = ans3;
            temp.MeasurementId = 1; // this is the primary key, and want to get rid of this.
            // i want to insert at end of database. but how?

            // add to local collection.
            _MeasurementCollection.Add(temp);

            Context.AddToMeasurements(temp);

            Context.BeginSaveChanges(SaveChangesCallback, temp);

            //if wifi is on:
            UploadMeasurements();
        }