private void Edit_Click(object sender, RoutedEventArgs e)
{
Premises premises = premisesList.SelectedItem as Premises;
premisesAdd p = new premisesAdd(premises);
p.ShowDialog();
}
private void addPremises(object sender, RoutedEventArgs e)
{
premisesAdd premises = new premisesAdd(new Premises());
premises.ShowDialog();
}