public void SaveFile(Stream stream)
{
XDocument xDoc = new XDocument();
XElement root = new XElement(GetType().Name); //ActiveChild.Serialize();
root.Add(new XAttribute("fileVersion", fileVersion));
root.Add(new XAttribute("appVersion", Assembly.GetEntryAssembly().GetName().Version));
textManager.OptimizeForSave(this);
root.Add(textManager.Serialize());
root.Add(ActiveChild.Serialize());
xDoc.Add(root);
xDoc.Save(stream);
textManager.RestoreAfterSave(this);
}