public void Write(string filename, ActivityFolder folder, Configuration configuration)
{
var document = new XmlDocument();
document.AddXmlDeclaration("1.0", "UTF-8", null);
document
.AddSubElement("kml", "http://www.opengis.net/kml/2.2")
.WithXmlns("gx", "http://www.google.com/kml/ext/2.2")
.WithXmlns("kml", "http://www.opengis.net/kml/2.2")
.WithXmlns("atom", "http://www.w3.org/2005/Atom")
.AppendChild(GetFolderNode(document, folder, configuration))
;
document.Save(filename);
}
