private IEnumerable <object> RootElements(Repository repo)
{
List <object> result = new List <object>();
foreach (object each in repo.GetElements())
{
MetaDescription meta = repo.DescriptionOf(each);
PropertyDescription containerProperty = meta.ContainerPropertyOrNull();
if (containerProperty != null)
{
Object container = containerProperty.Read(each);
if (container == null)
{
result.Add(each);
}
}
else
{
result.Add(each);
}
}
;
return(result);
}