private void UnosAdr(object sender, RoutedEventArgs e)
        {
            if (dgOsobe.SelectedItem == null)
            {
                MessageBox.Show("Izaberite osobu!");
                return;
            }
            Baza db = new Baza();

            BindingGroup.CommitEdit();
            db.Adresas.Add(a);
            a.Osobe.Add(db.Osobas.Where(oDB => oDB.ID == o.ID).First());
            db.SaveChanges();
            o = new Osoba();
            a = new Adresa();
        }
        private void Unos(object sender, RoutedEventArgs e)
        {
            Baza db = new Baza();

            BindingGroup.CommitEdit();
            try
            {
                db.Osobas.Add(o);
                o = new Osoba();
                db.SaveChanges();
                dgOsobe.ItemsSource = db.Osobas.ToList();
            } catch (Exception ee)
            {
                MessageBox.Show("Proverite podatke!");
                MessageBox.Show(ee.Message);
            }
        }