将InkCanvas保存到字节数组到文件时图像被损坏

// 保存InkCanvas为字节数组
using (MemoryStream stream = new MemoryStream())
{
    RenderTargetBitmap bitmap = new RenderTargetBitmap((int)inkCanvas.ActualWidth, (int)inkCanvas.ActualHeight, 96, 96, PixelFormats.Default);
    bitmap.Render(inkCanvas);

    BitmapEncoder encoder = new PngBitmapEncoder(); // 使用PNG编码器
    encoder.Frames.Add(BitmapFrame.Create(bitmap));
    encoder.Save(stream);

    byte[] byteArray = stream.ToArray();

    // 将字节数组保存到文件
    File.WriteAllBytes("path/to/file.png", byteArray);
}

// 从文件加载字节数组并还原InkCanvas
byte[] byteArray = File.ReadAllBytes("path/to/file.png");

using (MemoryStream stream = new MemoryStream(byteArray))
{
    BitmapDecoder decoder = BitmapDecoder.Create(stream, BitmapCreateOptions.None, BitmapCacheOption.OnLoad);
    BitmapFrame frame = decoder.Frames[0];

    DrawingVisual visual = new DrawingVisual();
    using (DrawingContext context = visual.RenderOpen())
    {
        context.DrawImage(frame, new Rect(0, 0, frame.Width, frame.Height));
    }

    RenderTargetBitmap bitmap = new RenderTargetBitmap((int)frame.Width, (int)frame.Height, 96, 96, PixelFormats.Default);
    bitmap.Render(visual);

    inkCanvas.Strokes = new StrokeCollection();
    inkCanvas.Strokes.Add(new Stroke(new StylusPointCollection()));
    inkCanvas.Strokes = new StrokeCollection(bitmap.GetFlattenedPathGeometry().GetOutlinedPathGeometry());
}