多值Cookie

  **读取Cookie：
       读取单值Cookie：
              HttpCookie SingleValueCookie=Request.Cookies["test1"];
              string CookieValue= SingleValueCookie.Value;
              string CookieExpires=SingleValueCookie.Expires.ToString();
       读取多值Cookie：
              HttpCookie MultiValueCookie=Request.Cookies["test2"];
              MultiValue.value==>结果为：key1=value1&key2=value2;
              foreach(string subkey in MultiValueCookie.Values.AllKeys)
              {
                  string value1=MultiValueCookie.Values["subkey"];
                  string Expires=MultiValueCookie.Expires;
              }