Hierarchy Problem -> Replace Recursion with Linq Join?

Question

I have a self referential table, which has ID, ParentID (nullable).

So, the table contains many nodes, each node could be the root in the hierarchy (parent is null),

Answer 1

I know this is an old post but you should check out this extension:

http://www.scip.be/index.php?Page=ArticlesNET23

I've been using it and it is working great.