How to add multiple series on a Chart in Excel using C#

Question

I would like to add a chart like the following picture.

This chart has 3 series (Black, Red, Blue).

The following is a block of code that creates "one" series on a chart...

Excel._Workbook oWorkbook = (Excel._Workbook)oSheet.Parent;
Excel._Chart oChart = (Excel._Chart)oWorkbook.Charts.Add(oSheet, Type.Missing, Type.Missing, Type.Missing);

// Y axis data
Excel.Range oRange = oSheet.get_Range(yRange, Type.Missing);

// Creates a chart
oChart.ChartWizard(oRange, chartType, 2, Excel.XlRowCol.xlColumns, Type.Missing, Type.Missing, false, title, xAxisTitle, yAxisTitle, Type.Missing);

// Sets X axis category
Excel.Series oSeries = (Excel.Series)oChart.SeriesCollection(1);    
oSeries.XValues = oSheet.get_Range(xRange, Type.Missing);
oChart.Name = chartName;

MSDN API is not helpful enough and I can hardly find any tutorial or example on this problem. (Or maybe I am not that good searching them)
It would be appreciated if someone gives me a solution.

Answer 1

I could solve this issue with very simple solution.
If I set the yRange (oRange) right, "ChartWizard" method automatically creates the graphs.
So instead of range having "A2:A100", "A2:A100,C2:C100" will generates two lines (series) on one chart and also if the data range includes the heading (or series label), the "ChartWizard" will automatically put the series name in the legend.