提供MD5，SHA1，SHA256，SHA512等四种算法，加密字串的长度依次增大。 加密算法实现-Provides four algorithms MD5, SHA1, SHA256, SHA512, the encryption string of length increase sequentially. Encryption algorithm

.Net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。-. Net Framework With CLR provides support for the rich, can be achieved with minimal code using C and other old-fashioned language previously difficul

传统的md5加密算法，对文件进行加密，得到相应的128bit的摘要。-Traditional md5 encryption algorithm to encrypt files, the corresponding summary of 128bit.

MD5加密计算方法,提供示例,代码简单,一看就能明白-MD5 encryption method, provide the sample, the code is simple, can understand