Convert SQL to Linq left join with null

Question

How can I convert properly this SQL to linq

select  t1.ProgramID
from Program t1 LEFT JOIN ProgramLocation t2 ON  t1.ProgramID = t2.ProgramID 
where t2.Progr         


        

Answer 1

Could you use except instead?

var progy = (
  from u in db.ProgramLocations
  select u.ProgramID
).Except(from b in db.Programs select b.ProgramID);