Transfer a clipping path from one (or multiple) image to another one

public void TransferClippingPath()
{
    using (var reader = ImageReader.Create(@""))
    {
        var clippingPath = reader.ClippingPaths.First();
        var path = Path.Create(clippingPath, 256, 256);
                
        using (var maskGen = new  ImageGenerator(reader, RgbColor.Transparent))
        using (var writer = new TiffWriter(@"..\Result.tif"))
        {
            writer.Setup(new TiffSettings(CompressionType.Lzw));
                    
            maskGen.GraphicsContainer = new GraphicsContainer(maskGen);
            maskGen.GraphicsContainer.GetGraphics().ClippingPaths.Add(path);
            (maskGen + writer).Run();
        }
    }
}

using (var reader = ImageReader.Create(@"..\Result.tif"))
{
    var cpcount = reader.ClippingPaths.Count; //ClippingPaths is null, throws System.NullReferenceException
}