private void InfoStaff(object sender, RoutedEventArgs e)
 {
     if (Hotel.IsPerson != null)
     {
         InfoStaffAdmin ISA = new InfoStaffAdmin();
         ISA.Show();
     }
 }
        private void InfoStaff(object sender, RoutedEventArgs e)
        {
            InfoStaffAdmin ISA = new InfoStaffAdmin();

            ISA.Show();
        }