程序代码：

 fs = new (@"C:\Documents and Settings\Administrator\桌面\XXX.jpg", );
byte[] buf = new byte[fs.Length];
fs.Read(buf, 0, (int)fs.Length);
string s = Convert.ToBase64String(buf);
fs.Close();

程序代码：

byte[] b = Convert.FromBase64String(s);
 ms = new (b);
System.Drawing.Image img = System.Drawing.Image.FromStream(ms);