private void Btn_Neu_Click(object sender, RoutedEventArgs e)
{
PersonenDialog dialog = new PersonenDialog();
if (dialog.ShowDialog() == true)
{
Personenliste.Add(dialog.DataContext as Person);
}
}
private void Btn_Aendern_Click(object sender, RoutedEventArgs e)
{
PersonenDialog dialog = new PersonenDialog();
dialog.DataContext = new Person(Dgd_Personen.SelectedItem as Person);
dialog.Title = (dialog.DataContext as Person).Vorname + " " + (dialog.DataContext as Person).Nachname;
if (dialog.ShowDialog() == true)
Personenliste[Dgd_Personen.SelectedIndex] = (dialog.DataContext as Person);
}