Question

I have two List<object>. A field in the objects is party_id.

Is there a way, using LINQ, to get a list back of only the common party_ids? So, maybe join the lists on Party ID and then return the ones with matches?

In SQL, I guess I’d do:

SELECT DISTINCT party_id FROM table1
INNER JOIN table2 on table1.party_id = table2.party_id

Thanks.

Answer 1

Without pulling out Reflector and verifying the implementations of the aforementioned workable solutions, I think it would be most efficient to use Join(...):

var party_on_dude = from table1
                    join table2 on table1.party_id equals table2.party_id
                    select table1.party_id;