// Chart series can be added dynamically, after such update UpdateSeries() should be called to update the chart's serries(mySeriesX...) public void UpdateSeries() { if (mySeriesX == null) { if (this.myGraphPane.CurveList.Count == 0) { return; } this.mySeriesX = new double[0]; } Libs.UpdateSeriesX(this.myGraphPane.CurveList[0], ref mySeriesX); }