[HttpGet][ActionName("Index")]public ActionResult Get(string signature,string timestamp,string nonce,string echostr){  if (CheckSignature.Check(signature, timestamp, nonce, token))  {    return Content(echostr);  }  else  {    return Content("err");  }

[HttpPost][ActionName("Index")]public ActionResult Get(string signature, string timestamp, string nonce){   StreamReader sr = new StreamReader(Request.InputStream, Encoding.UTF8);   XmlDocument doc = new XmlDocument();   doc.Load(sr);   sr.Close();   sr.Dispose();    WxMessage wxMessage = new WxMessage();   wxMessage.ToUserName = doc.SelectSingleNode("xml").SelectSingleNode("ToUserName").InnerText;   wxMessage.FromUserName = doc.SelectSingleNode("xml").SelectSingleNode("FromUserName").InnerText;   wxMessage.MsgType = doc.SelectSingleNode("xml").SelectSingleNode("MsgType").InnerText;   wxMessage.CreateTime = int.Parse(doc.SelectSingleNode("xml").SelectSingleNode("CreateTime").InnerText);    if (wxMessage.MsgType == "event")   {     wxMessage.EventName = doc.SelectSingleNode("xml").SelectSingleNode("Event").InnerText;     if (!string.IsNullOrEmpty(wxMessage.EventName) && wxMessage.EventName == "subscribe")     {       string content = "您好，歡迎訪問garfieldzf8測試公眾平臺";       content = SendTextMessage(wxMessage, content);       return Content(content);    }  }      return Content("");}  private string SendTextMessage(WxMessage wxmessage,string content){   string result = string.Format(Message, wxmessage.FromUserName,wxmessage.ToUserName,DateTime.Now.Ticks, content);   return result;}   public string Message {   get   {     return @"<xml>           <ToUserName><![CDATA[{0}]]></ToUserName>           <FromUserName><![CDATA[{1}]]></FromUserName>           <CreateTime>{2}</CreateTime>           <MsgType><![CDATA[text]]></MsgType>           <Content><![CDATA[{3}]]></Content>         </xml>";      }  }

public class WxMessage {    public string ToUserName { get; set; }    public string FromUserName { get; set; }    public long CreateTime { get; set; }     public string Content { get; set; }    public string MsgType { get; set; }    public string EventName { get; set; }    public string EventKey { get; set; } }