图像裁剪C#没有.net库

using System.Drawing;
using System.IO;

public static void CropImage(string inputPath, string outputPath, int width, int height)
{
    using (var image = Image.FromFile(inputPath))
    {
        var croppedImage = CropImage(image, width, height);
        croppedImage.Save(outputPath);
    }
}

public static Image CropImage(Image image, int width, int height)
{
    var x = (image.Width - width) / 2;
    var y = (image.Height - height) / 2;
    var rect = new Rectangle(x, y, width, height);
    return image.Clone(rect, image.PixelFormat);
}