这是MD5验证的CSharp源码。作加密解密的可以看看。-This is the MD5 authentication CSharp source. For the encryption and decryption can see.

一个用于注册时的验证码的类，用CSharp编写的。希望能对大家有用！-register for a certification category code, prepared by using CSharp. We hope that the useful!