Entity Framework join many to many - sql-server

Question

I'm having some trouble 'converting' a T-SQL query to linq using Entity Framework v6.
My working T-SQL query looks like this:
SELECT
[Person].*, [Person_Firm_PersonResponsibility].*
FROM
[Person]
JOIN
[Person_Firm_PersonResponsibility] ON [Person].ID = [Person_Firm_PersonResponsibility].PersonID
WHERE
[Person_Firm_PersonResponsibility].FirmID = 389
AND [Person].ID = 330
In Linq I have the following:
using (var ctx = new MyContext())
{
var result = (from p in ctx.People
join r in ctx.Person_Firm_PersonResponsibility on p.ID equals r.PersonID
where r.FirmID == firmId && p.ID == personId
select p)
.Include("Person_Firm_PersonResponsibility.PersonResponsibility")
.Include("Person_Firm_PersonResponsibility")
.FirstOrDefault();
return result;
}
My goal is to only get a specific Person with responsibilities for a specific firm (firm ID) The relation between Firm, Person and Responsibilities is the many-to-many Person_Firm_PersonResponsibility table which I'm querying against.
The query 'works' in the sense that I get a the person, but it includes all of his/her responsibilities for any firm and not the specific firm (firmId) I've tried removing the .Include(""), but that didn't do it.
Does anyone know how to achieve this?

Answer 1

Try this:
from p in Persons
join r in Person_Firm_PersonResponsibilities
on p.ID equals r.PersonId
where (r.FirmId == 389 && p.ID == 330)
select new {p, r}
Tested using LinqPad which shows the equivalent SQL as being:
-- Region Parameters
DECLARE #p0 Int = 389
DECLARE #p1 Int = 330
-- EndRegion
SELECT [t0].[ID], [t0].[Name], [t1].[FirmId], [t1].[PersonId]
FROM [Person] AS [t0]
INNER JOIN [Person_Firm_PersonResponsibility] AS [t1] ON ([t0].[ID]) = [t1].[PersonId]
WHERE ([t1].[FirmId] = #p0) AND ([t0].[ID] = #p1)