OxyPlot creating model in VM

PlotModel model = new PlotModel();
CategoryAxis axis = new CategoryAxis
{
    Position = AxisPosition.Bottom,
    MajorStep = 1,
    MinorStep = 1,
    TextColor = OxyColors.RoyalBlue,
    FontSize = 10,
    MajorGridlineStyle = LineStyle.LongDash
};
LineSeries series = new LineSeries
{
    MarkerType = MarkerType.Circle,
    MarkerFill = OxyColor.FromRgb(0x20, 0xf0, 0xf0),
    Color = OxyColor.FromRgb(0x20, 0x20, 0xf0)
};
for (int i = 0; i < data.Length; i++)
{
    series.Points.Add(new DataPoint(i, data[i].Count));
    axis.Labels.Add(data[i].Label);
} //efor
model.Axes.Add(axis);
model.Series.Add(series);