圖片與字節流轉換問題

usingSystem;
usingSystem.Collections.Generic;
usingSystem.Linq;
usingSystem.Text;
usingSystem.Drawing;
usingSystem.IO;
namespaceMicrosoft.Form.Base
{
    classImageToByte
    {
        /// <summary>
        /// 圖片轉換成字節流
        /// </summary>
        /// <param name="img">要轉換的Image對象</param>
        /// <returns>轉換後返回的字節流</returns>
        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;            
        }
        /// <summary>
        /// 字節流轉換成圖片
        /// </summary>
        /// <param name="byt">要轉換的字節流</param>
        /// <returns>轉換獲得的Image對象</returns>
        public static Image BytToImg(byte[] byt)
        {
            MemoryStream ms = new MemoryStream(byt);
            Image img = Image.FromStream(ms);
            return img;
        }
        //
        /// <summary>
        /// 根據圖片路徑返回圖片的字節流byte[]
        /// </summary>
        /// <param name="imagePath">圖片路徑</param>
        /// <returns>返回的字節流</returns>
        private static byte[] getImageByte(stringimagePath)
        {
            FileStream files = new FileStream(imagePath, FileMode.Open);
            byte[] imgByte = new byte[files.Length];
            files.Read(imgByte, 0, imgByte.Length);
            files.Close();
            returnimgByte;
        }
    }
}