add node to xml file

Hi,

I try to parse an xml file by the following way:

// read the content    var xml_file = File(xml_file_path);    xml_file.open('r');    var content = xml_file.read();    xml_file.close();    // add the node    var root = new XML(content);    var unit_test_resolution = <unit-test>{resolution}</unit-test>;    root.appendChild(unit_test_resolution);    // replace the file    var my_file = new File(xml_file_path);    var edit_content = root.toXMLString();    my_file.open('w');    my_file.writeln('<?xml version="1.0" encoding="UTF-8"?>');    my_file.writeln(edit_content);

I'm not sure that is a good solution can anyone help me? For example, my file already has the '<?xml version="1.0" encoding="UTF-8"?>' header. But if I read it by this way I have to put it each time egain …

In advance thanks you for your help.

Best regards.
Bastien