asp.net c# - multi series for stacked column chart

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C#

ASP.NET

HighCharts

buyer1 buyer2 buyer3
1 2014-01-01 48556.4 0 60861
2 2014-02-01 34002.9 0 10120
3 2014-03-01 151749.28 0 138680.8
4 2014-04-01 325300.69 0 74245.5
5 2014-05-01 32511.6 0 29583.3
6 2014-06-01 97112.6 0 0
7 2014-07-01 108101.32 5280 93197.72
8 2014-08-01 155682.13 0 167606.1
9 2014-09-01 162979.85 12125 119540.5
10 2014-10-01 42635.5 19797.6 372881.92
11 2014-11-01 67300.6 0 360722.9
12 2014-12-01 35705.3 7131.5 86175
13 2015-01-01 0 3560 0


Hi.
I am trying to make stacked column chart about order statistics.
I have datatable like above.

I success to print datetime at xAxis

List<string> lstXaxis = new List<string>();
        for (int i = 0; i < dt.Rows.Count; i++)
        {
            lstXaxis.Add(dt.Rows[i][0].ToString().Substring(0,7));
        }

 DotNet.Highcharts.Highcharts chart = new DotNet.Highcharts.Highcharts("chart1")
         .InitChart(new Chart { DefaultSeriesType = DotNet.Highcharts.Enums.ChartTypes.Column })
         .SetTooltip(new Tooltip { Formatter = "function() { return '' + this.x + '<br/>' + this.series.name + ': ' + this.y + '<br/>' + 'Total: ' + this.point.stackTotal;}" })
         .SetYAxis(new YAxis { Title = new YAxisTitle { Text = "Amount" }, Min = 0 })
         .SetPlotOptions(new PlotOptions { Column = new PlotOptionsColumn { Stacking = Stackings.Normal } })

         .SetTitle(new Title { Text = "ORDER STATISTICS" })
         .SetXAxis(new XAxis
         {
             Categories = lstXaxis.ToArray()
         })

and I have problem with series data
how can I push multi series to chart?

Series[] series = new Series[dt.Columns.Count];
       for (int j = 0; j <= dt.Columns.Count - 1; j++)
       {
          series[j] = new Series
               {
                   Name = dt.Columns[j].ColumnName.ToString(),
                   for (int k = 1; k < dt.Rows.Count; k++)
                   {
                   Data = new Data(new object[] { dt.Columns[j]("Page Visits") })
               };
           }
       }