．net数据加密

        MD5CryptoServiceProvider md5hasher = new MD5CryptoServiceProvider();
        Byte[] result;
        UTF8Encoding encoder = new System.Text.UTF8Encoding();
        result= md5hasher.ComputeHash(encoder.GetBytes(text));
        return result; //return byte

       or return

        return Convert.ToBase64String(result)