public void Save(string filename)
{
string folder = Path.GetDirectoryName(filename);
if (!Directory.Exists(folder)) Directory.CreateDirectory(folder);
XmlConverter xmlConverter = new XmlConverter();
XmlDocument xmlDocument = new XmlDocument();
xmlDocument.AppendChild(xmlDocument.CreateXmlDeclaration("1.0", null, null));
ConversionContext context = new ConversionContext { Culture = Culture.Invariant, Device = xmlDocument };
XmlNode xmlNode = xmlConverter.ConvertTo(this, context) as XmlNode;
if (xmlNode != null)
{
xmlDocument.AppendChild(xmlNode);
xmlDocument.Save(filename);
}
}