score:3
Accepted answer
var _result = (from a in product_master
join b in product
on a.product_id equals b.product_id
where b.buyer_user_id == 12
select a).distinct();
score:0
var pids = product.where(p => p.buyer_user_id == 12);
var r = product_master.where(pm => pids.contains(pm.product_id));
Source: stackoverflow.com
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