linq get values is not in other table

var result=(from e in db.Users
            select e.UserID).Except(from m in db.Fi
                                    select m.UserID).ToList();

var list = (from user in db.Users
                where !db.Fi.Any(f =&gt; f.UserID == user.UserID)
                select user.UserName).ToList()

Submit

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