/// <summary>
  /// 基础消息内容
  /// </summary>
  [XmlRoot(ElementName = "xml")]
  public class BaseMessage
  {
    /// <summary>
    /// 初始化一些内容，如创建时间为整形，
    /// </summary>
    public BaseMessage()
    {
      this.CreateTime = DateTime.Now.DateTimeToInt();
    }

    /// <summary>
    /// 开发者微信号
    /// </summary>
    public string ToUserName { get; set; }

    /// <summary>
    /// 发送方帐号（一个OpenID）
    /// </summary>
    public string FromUserName { get; set; }

    /// <summary>
    /// 消息创建时间 （整型）
    /// </summary>
    public int CreateTime { get; set; }

    /// <summary>
    /// 消息类型
    /// </summary>
    public string MsgType { get; set; }

    public virtual string ToXml()
    {
      this.CreateTime = DateTime.Now.DateTimeToInt();//重新更新
      return MyXmlHelper.ObjectToXml(this);
    }

  }

  /// <summary>
  /// 回复文本消息
  /// </summary>
  [System.Xml.Serialization.XmlRoot(ElementName = "xml")]
  public class ResponseText : BaseMessage
  {
    public ResponseText()
    {
      this.MsgType = ResponseMsgType.Text.ToString().ToLower();
    }

    public ResponseText(BaseMessage info) : this()
    {
      this.FromUserName = info.ToUserName;
      this.ToUserName = info.FromUserName;
    }

    /// <summary>
    /// 内容
    /// </summary>    
    public string Content { get; set; }
  }

  /// <summary>
  /// 回复图文消息
  /// </summary>
  [System.Xml.Serialization.XmlRoot(ElementName = "xml")]
  public class ResponseNews : BaseMessage
  {
    public ResponseNews()
    {
      this.MsgType = ResponseMsgType.News.ToString().ToLower();

      this.Articles = new List<ArticleEntity>();
    }
    public ResponseNews(BaseMessage info) : this()
    {
      this.FromUserName = info.ToUserName;
      this.ToUserName = info.FromUserName;
    }

    /// <summary>
    /// 图文消息个数，限制为10条以内
    /// </summary>
    public int ArticleCount
    {
      get
      {
        return this.Articles.Count;
      }
      set
      {
        ;//增加这个步骤才出来XML内容
      }
    }

    /// <summary>
    /// 图文列表。
    /// 多条图文消息信息，默认第一个item为大图,注意，如果图文数超过10，则将会无响应
    /// </summary>
    [System.Xml.Serialization.XmlArrayItem("item")]
    public List<ArticleEntity> Articles { get; set; }

  }

ResponseText response = new ResponseText(info);
response.Content = "抱歉，此功能暂未开通。";
result = response.ToXml();

 /// <summary>
    /// 订阅或者显示公司信息
    /// </summary>
    /// <param name="info"></param>
    /// <returns></returns>
    private string ShowCompanyInfo(BaseMessage info)
    {
      string result = "";
      //使用在微信平台上的图文信息(单图文信息)
      ResponseNews response = new ResponseNews(info);
      ArticleEntity entity = new ArticleEntity();
      entity.Title = "广州爱奇迪软件科技有限公司";
      entity.Description = "欢迎关注广州爱奇迪软件--专业的单位信息化软件和软件开发框架提供商，我们立志于为客户提供最好的软件及服务。\r\n";
      entity.Description += "我们是一家极富创新性的软件科技公司，从事研究、开发并销售最可靠的、安全易用的技术产品及优质专业的服务，帮助全球客户和合作伙伴取得成功。\r\n......（此处省略1000字，哈哈）";
      entity.PicUrl = "http://www.iqidi.com/WeixinImage/company.png";
      entity.Url = "http://www.iqidi.com";

      response.Articles.Add(entity);
      result = response.ToXml();

      return result;
    }