public void miEditWord_Click(object sender, RoutedEventArgs e)
{
// https://stackoverflow.com/questions/16236905/access-parent-window-from-user-control
var dlg = new WordsLangDetailDlg(Window.GetWindow(this), vmWordsLang, SelectedWordItem);
dlg.ShowDialog();
}
void btnAdd_Click(object sender, RoutedEventArgs e)
{
var dlg = new WordsLangDetailDlg(Window.GetWindow(this), vm, vm.NewLangWord());
dlg.ShowDialog();
}