private void new_ferma_btn_Click(object sender, RoutedEventArgs e)
        {
            Ferma_2018.Windows.Ferma.Ferma_form ferma_form = new Windows.Ferma.Ferma_form();
            ferma_forms.Add(ferma_form);

            ferma_form.Show();
        }
 public FermaConstructor(FermaFile active_file, Ferma_form ferma_form)
 {
     this.active_file = active_file;
     this.ferma_form  = ferma_form;
     InitializeComponent();
 }