private void BankChanged(object sender, EventArgs e) { if (FinancialInstitutions.Where(r => r.IsChecked == true).Count() > 0) { Accounts = FinancialInstitutions.Where(r => r.IsChecked == true).First().Accounts; if (!Accounts.Any(r => r.IsChecked == true)) { Accounts.First().IsChecked = true; } AccountRadio.ItemsSource = Accounts; AccountTypeChecked(); } }