Polar chart

        using ZqzWebChart.Charting;
        for (double angle = 0.0; angle <= 360.0; angle += 10.0)
        {
            double yValue = (1.0 + Math.Sin(angle / 180.0 * Math.PI)) * 10.0;
            Chart1.Series["Series1"].Points.AddXY(angle + 90.0, yValue);
            Chart1.Series["Series2"].Points.AddXY(angle + 270.0, yValue);
        }
        Chart1.Series["Series1"].ChartType = SeriesChartType.Polar;
        Chart1.Series["Series2"].ChartType = SeriesChartType.Polar;