//加密
    public string Encrypt(string pToEncrypt)
    {
        byte[] barray = System.Text.UnicodeEncoding.Unicode.GetBytes(pToEncrypt);
        return Convert.ToBase64String(barray);
    }
    //解密
    public string Decrypt(string pToDecrypt)
    {
        byte[] mingwen = Convert.FromBase64String(pToDecrypt);
        string str = System.Text.UnicodeEncoding.Unicode.GetString(mingwen);
        return str;
    }