c# how to add second axis to chart? -

i have chart. have created list, , putting data in list. problem want display 2 axis, cant.(i have enabled 2 x axis), dont know how write code behind display second axis.

i want dispay reltime, , abstime too, primary , secondary axis dispays same data(reltime)

 var series = chart1.series.add("ch0");           var series2 = chart1.series.add("ch1");           series.charttype = seriescharttype.line;           series2.charttype = seriescharttype.line;            long utolsoms=0;           foreach (adatrecord item in tarolo)           {               utolsoms = item.reltime;               series.points.addxy(item.reltime , item.ch0,);//+abstime (item.abstime)                series2.points.addxy(item.reltime, item.ch1);            }           var chartarea = chart1.chartareas[series.chartarea];            console.write(utolsoms);           chartarea.axisx.minimum = 0;           chartarea.axisx.maximum = utolsoms+1;           // auto scroll engedélyezése           chartarea.cursorx.autoscroll = true;            chartarea.axisx.scaleview.zoomable = true;           int position = 0;           int size = 30;           chartarea.axisx.scaleview.zoom(position, size);