public EventController(IEventPageService eventPageService, ICommentPageService commentPageService)
 {
     this._eventPageService   = eventPageService ?? throw new ArgumentNullException(nameof(eventPageService));
     this._commentPageService = commentPageService ?? throw new ArgumentNullException(nameof(commentPageService));
     ;
 }
 public CommentController(ICommentPageService commentPageService)
 {
     this._commentPageService = commentPageService;
 }