public BasicGraphCar(string aCarID, Color aCarColour, string aCategoryID, string aTyreManufacturerID) : base(aCarID, aCarColour, aCategoryID, aTyreManufacturerID)
 {
     Series = new HHOxyLineSeries
     {
         Color           = OxyPlotHelpers.GetOxyColor(CarColor),
         StrokeThickness = 2,
         Title           = CarID,
         BrokenLineStyle = LineStyle.None
     };
 }
        protected override void OnCarColourChanged()
        {
            base.OnCarColourChanged();

            Series.Color = OxyPlotHelpers.GetOxyColor(CarColor);
        }