//create NPointSeries

public NPointSeries AddPointSeries(IEnumerable<Point> pts, Color seriesColor, string name)

{

NPointSeries series = (NPointSeries)_chart.Series.Add(SeriesType.Point);

series.UseXValues = true;

series.DataLabelStyle.Visible = false;

series.PointShape = PointShape.Ellipse;

series.Name = name;

series.FillStyle = new NColorFillStyle(seriesColor);

foreach(Point pt in pts)

{

NDataPoint dataPoint = new NDataPoint(pt.X, pt.Y);

series.AddDataPoint(dataPoint);

}

UpdatePointSeriesAppearence(series);

return series;

}

// set different colors to each point

private void UpdatePointSeriesAppearence(NPointSeries series)

{

for (int iPt = 0; iPt < series.GetDataPointCount(); iPt++)

{

NDataPoint dataPoint = series.ComposeDataPoint(iPt);

Color color = GetPtColor(iPt);

if (settings.SymbolType == SymbolStyle.None)

{

dataPoint[DataPointValue.StrokeStyle] = new NStrokeStyle(1, color);

dataPoint[DataPointValue.FillStyle] = new NColorFillStyle(Color.Transparent);

}

else

dataPoint[DataPointValue.StrokeStyle] = new NStrokeStyle(1, color);

dataPoint[DataPointValue.FillStyle] = new NColorFillStyle(color);

}

}

}