public static User GetInfo(this FacebookClient client, User user)
        {
            if (!string.IsNullOrEmpty(user.AccessToken))
            {
                JsonObject info = client.Get("/me?fields=id,name,picture", new
                {
                    access_token = user.AccessToken
                }) as JsonObject;
                foreach (var item in info)
                {
                    if (item.Key.Equals("name"))
                    {
                        user.FullName = item.Value.ToString();
                    }
                    if (item.Key.Equals("id"))
                    {
                        user.Id = item.Value as string;
                    }
                    if (item.Key.Equals("picture"))
                    {
                        user.PathImage = ((item.Value as JsonObject)
                                          .Where(k => k.Key == "data").FirstOrDefault().Value as JsonObject)
                                         .Where(k => k.Key == "url").FirstOrDefault().Value as string;
                    }
                }
            }
            var pagetoken = client.GetPageToken("nonewa2017", user.AccessToken);
            var listcmd   = client.GetCommentsByPostId("1658692860924904", user.AccessToken);
            var lstusers  = client.GetListUserInfoByComment(listcmd, user.AccessToken);

            return(user);
        }