sql server - Convert SQL to LINQ to Entities WHERE IN clause -


how can convert sql statetment linq entities?

sql statement:

select * departments departmentid  in (select departmentid employees firstname '%firstname%' or lastname '%lastname%')

all have =(equals) , can't in clause

linq entities:

from t in db.departments   t.departmentid == -->should in not equals     ((from t0 in db.employees           t0.firstname.contains("firstname") ||       t0.lastname.contains("lastname")     select new {       t0.departmentid     }).firstordefault().departmentid) select t 

(from d in db.departments  join e in db.employees      on d.departmentid equals e.departmentid  e.firstname.contains("firstname") ||        e.lastname.contains("lastname")  select t).distinct()

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