private void charactersComboBox_SelectionChanged(object sender, System.Windows.Controls.SelectionChangedEventArgs e) { switch (CharactersComboBox.SelectedIndex) { case 0: EmailTextBox.SetDefaultAsciiSpecialChars(); break; case 1: EmailTextBox.SetExtendedAsciiSpecialChars(); break; case 2: EmailTextBox.SetExtendedQuotedAsciiSpecialChars(); break; default: throw new NotSupportedException(); } }