et框架由于拥有CLR提供的丰富库支持，只需很少的代码即可实现先前使用C等旧式语言很难实现的加密算法。本类实现一些常用机密算法，供参考。其中MD5算法返回Int的ToString字串。返回数字字母型结果的算法参见之前Blog文章-* This program is free software　you can redistribute it and/or modify it

* under the terms of the GNU General Public License as published by the

* Free Software Foundation　either version 2, or (at your option) any

* later version.

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* This program is distributed in the hope that it will be useful,

* but WITHOUT ANY WARRANTY　without even the implied warranty of

* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.　See the

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* Inc., 59 Temple Place- Suite 330, Boston, MA 02111-1307, USA.