T-SQL,LINQ取集合当中的重复项

T-SQL：

select * from Articles where Title in(Select Title From Articles Group By title Having Count(*) > 1) order by title

LINQ:

from t in Articles where
(from t1 in Articles group t1 by t1.Title into groupT
where groupT.Count()>1 select groupT.Key).Contains(t.Title) orderby t.Title
select t