private void Btn_wyloguj(object sender, RoutedEventArgs e)
        {
            var logowanie = new LogowanieWlasciciel();

            logowanie.Show();
            Close();
        }
        private void btnObywatel_Click(object sender, RoutedEventArgs e)
        {
            var logowanieWlasciciel = new LogowanieWlasciciel();

            logowanieWlasciciel.Show();
            Close();
        }