如何在OxyPlot AngleAxis和MagnitudeAxis中画圆？

using OxyPlot;
using OxyPlot.Axes;
using OxyPlot.Series;

// 创建PlotModel对象
var plotModel = new PlotModel();

// 创建AngleAxis对象
var angleAxis = new AngleAxis
{
    StartAngle = 0,
    EndAngle = 360
};
// 将AngleAxis添加到PlotModel的Axes集合中
plotModel.Axes.Add(angleAxis);

// 创建MagnitudeAxis对象
var magnitudeAxis = new MagnitudeAxis
{
    Minimum = 0,
    Maximum = 1
};
// 将MagnitudeAxis添加到PlotModel的Axes集合中
plotModel.Axes.Add(magnitudeAxis);

// 创建LineSeries对象
var lineSeries = new LineSeries();

// 计算圆上的点坐标
const int pointCount = 100;
for (int i = 0; i <= pointCount; i++)
{
    double angle = 2 * Math.PI * i / pointCount;
    double x = Math.Cos(angle);
    double y = Math.Sin(angle);
    // 添加点到LineSeries的Items集合中
    lineSeries.Points.Add(new DataPoint(x, y));
}

// 将LineSeries添加到PlotModel的Series集合中
plotModel.Series.Add(lineSeries);

// 使用PlotView或其他渲染控件显示PlotModel