用opencvsharp改写这段代码

好的，以下是使用OpenCvSharp库重写的代码：

using OpenCvSharp;

class Program
{
    static void Main(string[] args)
    {
        Mat img1 = Cv2.ImRead("img1.jpg", ImreadModes.Grayscale);
        Mat img2 = Cv2.ImRead("img2.jpg", ImreadModes.Grayscale);
        Mat binaryImg1 = new Mat();
        Mat binaryImg2 = new Mat();
        Cv2.Threshold(img1, binaryImg1, 128, 255, ThresholdTypes.Binary);
        Cv2.Threshold(img2, binaryImg2, 128, 255, ThresholdTypes.Binary);
        Mat overlap = new Mat();
        Cv2.BitwiseAnd(binaryImg1, binaryImg2, overlap);
        int overlapPixels = Cv2.CountNonZero(overlap);
        double overlapArea = overlapPixels * pixelArea;
    }
}

请注意，这里使用了OpenCvSharp的方法和枚举来替代了OpenCV的方法和常量。