private void BtFinish_Click(object sender, RoutedEventArgs e)
        {
            if (CompetitionsToSelect.SelectedItem == null)
            {
                MessageBox.Show(Properties.Resources.NothingSelected);
                return;
            }

            _competition = _competitionService.ListCompetitionsToPreinscribeObject(_athlete)
                           .ElementAt(CompetitionsToSelect.SelectedIndex);

            if (_enrollService.IsAthleteInComp(_competition, _athlete))
            {
                MessageBox.Show(Properties.Resources.PreviouslyEnrolled);
                return;
            }

            new DialogPreinscripted(_athlete, _competition).ShowDialog();

            var competitionService = new CompetitionService();
            var enrollService      = new EnrollService(_competition);

            var category = _enrollService.GetCategory(_athlete, _competition);

            _enrollService.InsertAthleteInCompetition(_athlete, _competition, TypesStatus.PreRegistered);
            LoadData(TxDni.Text);
        }