GetElementListsOrderedByDepth(IEnumerable <XElement> nodes)
{
var cmp = Make.Comparer <int>((v1, v2) => v2 - v1);
var sortedDict = new SortedDictionary <int, List <XElement> >(cmp);
foreach (var element in nodes)
{
var depth = element.Depth();
var list = sortedDict.GetValueOrDefault(depth);
if (list == null)
{
list = new List <XElement>();
sortedDict.Add(depth, list);
}
list.Add(element);
}
return(sortedDict);
}