private static void ReorderElements(XContainer entity, Func <IEnumerable <XElement>, IEnumerable <XElement> > sorter, string elementName)
{
var props = entity.FindByLocalName(elementName).ToList();
// clear
props.Remove();
// re-add in new order, will be added to end
foreach (var prop in sorter(props).ToList())
{
entity.Add(prop);
}
}
