夏天的雙重性格

 //MD5加密
        private String MD5code(String str)
        {
            System.Security.Cryptography.MD5CryptoServiceProvider md5Hasher=new            System.Security.Cryptography.MD5CryptoServiceProvider();
            Byte[] data = md5Hasher.ComputeHash((new System.Text.ASCIIEncoding()).GetBytes(str));
            System.Text.StringBuilder sBuilder = new System.Text.StringBuilder();   
            for (int i=0 ;i< data.Length; i++){
                sBuilder.Append(data[i].ToString("x2"));
            }     
            return sBuilder.ToString() ;
        }