ColumnSeries series = new ColumnSeries()
{
XAxis = xAxis,
YAxis = yAxis,
ItemsSource = data,
ValueMemberPath = "Total",
HighlightedValuesDisplayMode = SeriesHighlightedValuesDisplayMode.Overlay,
HighlightedValueMemberPath = "Mobile",
HighlightedTitleSuffix = " - Mobile",
Title = "Online Traffic By Device Data"
};
chart.Series.Add(series);