private void OnUpdatedList(MeasurementEventArgs e)
 {
     var handler = UpdatedList;
     if (handler != null)
     {
         handler(this, e);
     }
 }
        public void updateGraph(MeasurementEventArgs args)
        {
            try
            {
                _graph.Series["SPEED"].Points.AddXY(args.Measurement.currentAndCycleTime, args.Measurement.SPEED / 10.0);

                _graph.Series["PULSE"].Points.AddXY(args.Measurement.currentAndCycleTime, args.Measurement.PULSE);
            }
            catch (NullReferenceException)
            {
                //TODO 
                Console.WriteLine("Mainscreen.updateGraph(): Code werkt nog niet met specialist blijkbaar!");
            }

        }