OpenCVSharp Binarization

public Mat Binarization_method()
        {
            Mat OriginalImage = new Mat("ImageLink",ImreadModes.AnyColor);
            Mat GrayImage = new Mat();
            Mat thresimg = new Mat();
            Cv2.CvtColor(OriginalImage, GrayImage, ColorConversionCodes.RGB2GRAY);
            Cv2.Threshold(GrayImage, thresimg, 100, 255, ThresholdTypes.Trunc);
            return GrayImage;
        }