private void AddCompanyCommandHandler(object sender, RoutedEventArgs e)
 {
     EditCompanyWindow window = new EditCompanyWindow();
     window.ShowDialog();
     window = null;
     ModelContainerHolder.UpdateModel();
 }
        private void AddCompanyCommandHandler(object sender, RoutedEventArgs e)
        {
            EditCompanyWindow window = new EditCompanyWindow();

            window.ShowDialog();
            window = null;
            ModelContainerHolder.UpdateModel();
        }