c# 靠谱的bitmap转byte[]

public static byte[] Bitmap2Byte(Bitmap bitmap)
        {
            using (MemoryStream stream = new MemoryStream())
            {
                bitmap.Save(stream , ImageFormat.Jpeg);
                byte[] data = new byte[stream.Length];
                stream.Seek( , SeekOrigin.Begin);
                stream.Read(data ,  , Convert.ToInt32(stream.Length));
                return data;
            }
        }