程序代码：

            FileStream photo = new FileStream("test.jpg", FileMode.Open); 
            byte[] buffer = new byte[65000]; 
            photo.Read(buffer, 0, buffer.Length); 
            Console.WriteLine("这里将图片转成String:"); 
            string photoStr = Encoding.ASCII.GetString(buffer); 
            Console.Write("转换成功！"); 
            photo.Close(); 
 
            Console.WriteLine("以下是讲String转换成图片："); 
            FileStream newPhoto = new FileStream("newPhoto.jpg", FileMode.Create); 
            newPhoto.Write(buffer, 0, buffer.Length); 
            //Image ima = Image.FromStream(newPhoto); 
            newPhoto.Close(); 
            Console.WriteLine("转换成功！"); 
            Console.ReadKey();