hierarchical information linq - options performance


i have hierarchical information - any opening an id (nullable) progenitor opening id.
i wish collect entries tree underneath given entry. sql server 2005 database. i am querying linq sql c# 3.5.



linq sql does support directly. choices arrange information formula several linq queries, perspective database surfaces cte.



which choice (or another option) cruise perform improved information volumes large?
is sql server 2008's upheld linq sql?



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