public IActionResult OnGet(int messageId)
 {
     if (messageId != 0)
     {
         Like like = new Like();
         like.MessageId = messageId;
         MessageBoard.AddLike(like);
         return(RedirectToPage("./Timeline"));
     }
     Messages = MessageBoard.GetMessages();
     Timeline = MessageBoard.Timeline();
     return(Page());
 }