private void DeleteButton_Click(object sender, RoutedEventArgs e)
{
string performanceName = performancesComboBox.SelectedValue.ToString();
string clientName = clientsComboBox.SelectedValue.ToString();
DateTime date = ConvertStringToDateTime(dateComboBox.SelectedValue.ToString());
typeTicket type = Cashbox.FindTicket(typeComboBox.SelectedValue.ToString());
if (cashbox.ReturnTicket(performanceName, date, clientName, type))
{
msgTextBlock.Text = "Билет успешно сдан в кассу.";
}
else
{
msgTextBlock.Text = "Не найден данный билет, на указанный спектакль.";
}
}