NChartControl control = this.nChartControl1;
NPolarChart chart = new NPolarChart();
control.Charts.Add(chart);

NAxis axis = chart.Axis(StandardAxis.Polar);
axis.View = new NRangeAxisView(new NRange1DD(0, 1000));

NPolarAreaSeries series = new NPolarAreaSeries();
series.InflateMargins = true;
chart.Series.Add(series);

series.AddDataPoint(new NPolarDataPoint(900, 0));
series.AddDataPoint(new NPolarDataPoint(1100, 10));
series.AddDataPoint(new NPolarDataPoint(1100, -10));