IOfficeChartSerie serieA = chart.Series.Add("Number of Bridges");
serieA.Values = chart.ChartData[2, 2, 10, 2];
serieA.SerieType = OfficeChartType.Line_Markers;
IOfficeChartSerie serieB = chart.Series.Add("Poor Bridges");
serieB.Values = chart.ChartData[2, 3, 10, 3];
serieB.SerieType = OfficeChartType.Line_Markers;
chart.PrimaryCategoryAxis.CategoryLabels = chart.ChartData[2, 1, 10, 1];
chart.PrimaryCategoryAxis.Font.Size = 8;
chart.PrimarySeriesAxis.Title = "Number of Bridges";
How do I add second Category Axes for the serieB (Poor Bridges) on the right site of the chart?