private void OnToAuthorization()
        {
            AuthorizationPage ap = new AuthorizationPage();

            ap.Enter += OnEnter;
            ap.OpenRegistrationPage += OnOpenRegistrationPage;
            Pages.Content            = ap;
        }
        private void MenuItem_Click_1(object sender, RoutedEventArgs e)
        {
            AuthorizationPage ap = new AuthorizationPage();

            ap.Enter += OnEnter;
            ap.OpenRegistrationPage += OnOpenRegistrationPage;
            Pages.Content            = ap;

            toolBar.Visibility = Visibility.Hidden;
        }
        private void Window_Loaded(object sender, RoutedEventArgs e)
        {
            while (!MyDataBase.Create())
            {
            }
            AuthorizationPage ap = new AuthorizationPage();

            ap.Enter += OnEnter;
            ap.OpenRegistrationPage += OnOpenRegistrationPage;
            Pages.Content            = ap;
        }