private void ClearCookiesVersion()
        {
            var cc = new CookieContainer();

            foreach (Cookie cookie in Cookies.GetAllCookies())
            {
                cookie.Version = 0;
                cc.Add(cookie);
            }
            Cookies = cc;
        }
 /// <summary>
 ///     导出当前cookie集合。
 /// </summary>
 /// <returns>当前cookie集合的JSON字符串。</returns>
 public string SmartQQCookies()
 {
     if (Status != ClientStatus.Active)
     {
         throw new InvalidOperationException("仅在登录后才能导出cookie");
     }
     return(new JObject
     {
         { "hash", Hash },
         { "psessionid", Psessionid },
         { "ptwebqq", Ptwebqq },
         { "uin", Uin },
         { "vfwebqq", Vfwebqq },
         {
             "cookies",
             JArray.FromObject(Cookies.GetAllCookies())
         }
     }.ToString(Formatting.None));
 }