public class WXverifyController : Controller    {        public ActionResult WXverify()        {            Load();            return View();        }        const string Token = "Aa123456";//你的token          protected void Load()        {            string postStr = "";            if (Request.HttpMethod.ToLower() == "post")            {                System.IO.Stream s = System.Web.HttpContext.Current.Request.InputStream;                byte[] b = new byte[s.Length];                s.Read(b, 0, (int)s.Length);                postStr = System.Text.Encoding.UTF8.GetString(b);                if (!string.IsNullOrEmpty(postStr))                {                    //ResponseMsg(postStr);                      Response.Write(ResponseMsg(postStr));                    Response.End();                }                //WriteLog("postStr:" + postStr);              }            else            {                Valid();            }        }        public string ResponseMsg(string s)        {            return s;        }        /// <summary>          /// 验证微信签名          /// </summary>          /// * 将token、timestamp、nonce三个参数进行字典序排序          /// * 将三个参数字符串拼接成一个字符串进行sha1加密          /// * 开发者获得加密后的字符串可与signature对比，标识该请求来源于微信。          /// <returns></returns>          private bool CheckSignature()        {            string signature = Request.QueryString["signature"].ToString();            string timestamp = Request.QueryString["timestamp"].ToString();            string nonce = Request.QueryString["nonce"].ToString();            string[] ArrTmp = { Token, timestamp, nonce };            Array.Sort(ArrTmp);     //字典排序              string tmpStr = string.Join("", ArrTmp);            tmpStr = FormsAuthentication.HashPasswordForStoringInConfigFile(tmpStr, "SHA1");            tmpStr = tmpStr.ToLower();            if (tmpStr == signature)            {                return true;            }            else            {                return false;            }        }        private void Valid()        {            string echoStr = Request.QueryString["echoStr"].ToString();            if (CheckSignature())            {                if (!string.IsNullOrEmpty(echoStr))                {                    Response.Write(echoStr);                    Response.End();                }            }        }