C# Outer Applicare in LINQ

Question

Come posso ottenere Outer Apply in LINQ? Sto avendo un po 'di problemi.

Ecco la query SQL che sto utilizzando.

SELECT u.masterID 
     ,u.user 
     ,h.created 
FROM dbo.Users u 
OUTER APPLY (SELECT TOP 1 * FROM UserHistory h where h.masterID = u.masterID ORDER BY created DESC) h 

Answer 1

from u in Users 
join UserHistory on u.masterID equals h.masterID into h 
select new {u.masterID, u.user, h.created.OrderByDescending().First()} 

Answer 2

from u in Users 
join UserHistory on u.masterID equals h.masterID into h 
select new { 
    u.masterID, 
    u.user, 
    Created = h.Select(x => x.created).OrderByDescending(c => c).FirstOrDefault() 
} 

Oppure, con un'associazione:

from u in Users 
let created = u.UserHistories.Select(x => x.created).OrderByDescending(c => c).FirstOrDefault() 
select new 
{ 
    u.masterID, 
    u.user, 
    Created = created 
}