//create default XML with data
private void btnCreateXML_Click(object sender, RoutedEventArgs e)
{
XmlData.CreateXmlWithCars();
if (File.Exists("cars.xml"))
{
btnCreateXML.Content = "XML vytvoreno";
btnCreateXML.Background = Brushes.Green;
fileName.Text = Path.GetFullPath("cars.xml");
}
}