public static class ImageHelper
    {
        public static Image RotateImageAndResetExif(string imagePath, int rotateFlipType)
        {
            const int OrientationId = 0x0112;

            Image image = Image.FromFile(imagePath);

            // Rotate the image pixels
            image.RotateFlip(GetRotateFlipTypeFromInt(rotateFlipType));

            // Reset EXIF orientation to '1' (normal)
            if (image.PropertyIdList.Contains(OrientationId))
            {
                PropertyItem prop = image.GetPropertyItem(OrientationId);
                prop.Value = BitConverter.GetBytes((short)1);
                image.SetPropertyItem(prop);
            }

            return image;
        }

        public static RotateFlipType GetRotateFlipTypeFromInt(int value)
        {
            switch (value)
            {
                case 0:
                    return RotateFlipType.RotateNoneFlipNone;
                case 1:
                    return RotateFlipType.Rotate90FlipNone;
                case 2:
                    return RotateFlipType.Rotate180FlipNone;
                case 3:
                    return RotateFlipType.Rotate270FlipNone;
                case 4:
                    return RotateFlipType.RotateNoneFlipX;
                case 5:
                    return RotateFlipType.Rotate90FlipX;
                case 6:
                    return RotateFlipType.Rotate180FlipX;
                case 7:
                    return RotateFlipType.Rotate270FlipX;
                default:
                    throw new ArgumentOutOfRangeException(nameof(value), "Invalid rotation value");
            }
        }
    }

= UserFunctions.ImageHelper.RotateImageAndResetExif("C:\images\img1.jpg", 1)