public void AddReadings(double dblConcentration, double dblAbsorbance)
    {
        clsRawDataReadings.RAW_DATA objRawData;

        if (IsNothing(mobjReadings))
        {
            mobjReadings = new clsRawDataReadings();
        }

        objRawData = new clsRawDataReadings.RAW_DATA();
        objRawData.Concentration = dblConcentration;
        objRawData.Absorbance    = dblAbsorbance;
        mobjReadings.Add(objRawData);
    }
 public void DeleteReading(clsRawDataReadings.RAW_DATA objRawData)
 {
     mobjReadings.Remove(objRawData);
 }