WPF拉丝刷性能

我需要在画布的背景上绘制网格线,画布上将放置其他控件。

我尝试创建一个StreamGeometry,用它来画线,并将其指定给DrawingBrush。然而,我发现如果StreamGeometry有太多的线条,在DrawingBrush被分配到画布之后,程序会变得缓慢。

是否存在“预渲染”网格线,并将其指定给画布?

我试过了 Freeze() 对笔刷和几何体进行了优化,但这似乎不起作用。我还有什么选择?

这是我的代码:

public void RenderGrid()
{
    this.UpdateGrid();
    Pen grid_pen = new Pen(Brushes.Blue, 0.1);
    StreamGeometry sg = new StreamGeometry();

    DrawingBrush b = new DrawingBrush();
    GeometryDrawing gd = new GeometryDrawing();
    gd.Geometry = sg;
    gd.Pen = grid_pen;
    b.Drawing = gd;

    StreamGeometryContext ctx = sg.Open();
    foreach (double d in this.VerticalGrids)
    {

        ctx.BeginFigure(new Point(d, 0), true, false);
        ctx.LineTo(new Point(d, this.RenderSize.Height), true,false);
    }
    foreach (double d in this.HorizontalGrids)
    {

        ctx.BeginFigure(new Point(0, d), true, false);
        ctx.LineTo(new Point(this.RenderSize.Width, d),true, false);
    }
    ctx.Close();
    sg.Freeze();
    gd.Freeze();

    b.Freeze();
    this.Background = b;
}