如何在sql查询中将此内容写入linq

Question

This is my sql query .

 select category from category where id in(select cid from subcategory)

I want to write this in linq . how can I write this .

there is sample which i know , but this I'm unable to write this for my requirement

from n in objvar
               where new[] { "Amit", "Kumar", "XYZ" }.Contains(n.hello)
               select n

Answer 1

A working solution would be

 var res= from c in Category
                    join
                        s in SubCategory on c.id equals s.cid
                    select c;