C#对图片的操作

public static byte[] getImageByte(string imagePath)
{
    FileStream files = new FileStream(imagePath, FileMode.Open);
    byte[] imgByte = new byte[files.Length];
    files.Read(imgByte, 0, imgByte.Length);
    files.Close();
    return imgByte;
}

public static byte[] ImgToByt(Image img)
{
    MemoryStream ms = new MemoryStream();
    byte[] imagedata = null;
    img.Save(ms, System.Drawing.Imaging.ImageFormat.Jpeg);
    imagedata = ms.GetBuffer();
    return imagedata;
}

public static Image BytToImg(byte[] byt)
{
    MemoryStream ms = new MemoryStream(byt);
    Image img = Image.FromStream(ms);
    return img;
}