VkNet.Categories.MessagesCategory.GetLongPollServer C# (CSharp) Метод

        public LongPollServerResponse GetLongPollServer(bool useSsl = false, bool needPts = false)
        {
            var parameters = new VkParameters
            {
                { "use_ssl", useSsl },
                { "need_pts", needPts }
            };
            return _vk.Call("messages.getLongPollServer", parameters);
        }

 public void GetLongPollServer_AccessTokenInvalid_ThrowAccessTokenInvalidException()
 {
     var cat = new MessagesCategory(new VkApi());
     This.Action(() => cat.GetLongPollServer()).Throws<AccessTokenInvalidException>();
 }