public ManagerMainViewModel()
        {
            EmployeesCommand = new Command(OnEmployeesCommandExecute);
            HallCommand      = new Command(OnHallCommandExecute);
            MenuCommand      = new Command(OnMenuCommandExecute);
            ReportsCommand   = new Command(OnReportsCommandExecute);
            ActionsCommand   = new Command(OnActionsCommandExecute);
            ReviewsCommand   = new Command(OnReviewsCommandExecute);
            ExitCommand      = new Command(OnExitCommandExecute);

            //TODO: запускать первой страницу мониторинга
            CurrentManagerPage = new ManagerHallViewModel();
        }
 private void OnHallCommandExecute()
 {
     CurrentManagerPage = new ManagerHallViewModel();
 }