Bitmap bmp = new Bitmap(filepath);  MemoryStream ms = new MemoryStream();  bmp.Save(ms, System.Drawing.Imaging.ImageFormat.Gif);  byte[] arr = new byte[ms.Length];  ms.Position = 0;  ms.Read(arr, 0, (int)ms.Length);  ms.Close();string   pic = Convert.ToBase64String(arr);

byte[] imageBytes = Convert.FromBase64String(pic);//讀入MemoryStream對象MemoryStream memoryStream = new MemoryStream(imageBytes, 0, imageBytes.Length);memoryStream.Write(imageBytes, 0, imageBytes.Length);//轉成圖片Image image = Image.FromStream(memoryStream);