how to show to y values in MVC chart helper.

Question

MVC also provides a chart helper , and MS documentation shows all types of chart images, but i am unable to use two y values , i tried a lot and now i think there is no way or it just doesn't support column chart with multiple y values.

what i want is , to show each department's performance each month like shown in below figure

 

 

suppose x axis (1,2,3,4,5,6,7) are department , y axis (performance in jan,feb and march)

 i have tried below code, there is no way to use two y values ,

if i add two series then it generates multiple x's.

@{
    var chart = new Chart(width: 500, height: 500, theme: ChartTheme.Yellow)
   .AddTitle("......")
   .AddSeries("Default", chartType: "column",
        xValue: Model, xField: "Department",
        yValues: Model, yFields: "Month" // no option to include multiple y


        )

    .Write();
}