//MENU
private void AddNewClient_Click(object sender, RoutedEventArgs e)
{
AddClient ac = new AddClient();
ac.Show();
this.Hide();
}
private void Button_Click_1(object sender, RoutedEventArgs e)
{
AddClient ac = new AddClient();
ac.Show();
this.Hide();
}
private void Button_Click_2(object sender, RoutedEventArgs e) // Кнопка "Добавить клиента"
{
AddClient ac = new AddClient(conString);
ac.Show();
}