具有太多LineGeometry对象的路径中的线条模糊

Question

我试图以编程方式在XAML Canvas上绘制一条包含大量断开线段的路径

        Path path = new Path();
        path.Stroke = new SolidColorBrush(Windows.UI.Colors.White);
        path.StrokeThickness = 2.0;
        GeometryGroup geomGroup = new GeometryGroup();

        for (int i = 0; i < Samples.Count; ++i)
        {
            double f = Samples[i];

            Point a = new Point(i * dpixels, y_c - f * y_c);
            Point b = new Point(i * dpixels, y_c + f * y_c);

            LineGeometry line = new LineGeometry();
            line.StartPoint = a;
            line.EndPoint = b;
            geomGroup.Children.Add(line);
        }

        path.Data = geomGroup;
        canvas.Children.Add(path);

问题是当GeometryGroup中的LineGeometry对象太多时，线条会变得模糊。这很混乱，因为它似乎完全取决于行数。如果我添加完全相同的线，但更少，它们不再模糊。这里发生了什么，我该如何解决？

谢谢！

大卫