Series series22 = new Series(" ") {ChartType = SeriesChartType.Point};
        foreach (var p in data)
             series22.Color = System.Drawing.Color.FromArgb(255, 255, 255); //white color
         series22.Points.AddXY(30.0015,10.0015);
        series22.Points.AddXY(75.0015,40.0015);

        chart4.Series.Add(series22);