static int appId = 123456; // указываем id приложения
        static string email = "test@mail.ru"; // email для авторизации
        static string password = "test"; // пароль
        static long? _ownerid = -12345678;

        static void Main(string[] args)
        {
          Like();
        }

        static VkApi authVk()
        {
            Settings scope = Settings.All; //ошибка 401
            // Settings scope = Settings.Wall; //Ошибки не будет

            var vk_api = new VkApi();
            vk_api.Authorize(new ApiAuthParams
            {
                ApplicationId = (ulong)appId,
                Login = email,
                Password = password,
                Settings = scope
            });

            return vk_api;
        }

        static void Like ()
        {
            var vk_api = authVk();
            vk_api.Likes.Add(new LikesAddParams
            {
                Type = LikeObjectType.Post,
                ItemId = 5073,
                OwnerId = _ownerid,
                AccessKey = vk_api.Token

            });
            Console.WriteLine("goodlike");
        }