var list = (from rec in db.Records
            join usr in db.UserProfiles on rec.User_id equals usr.id
            join cat in db.CategoriesRecord on rec.Category equals cat.id
            join seo_source in db.SEOs on rec.id equals seo_source.id_record 

            into t1
            join seo in t1.DefaultIfEmpty()

            where rec.Type == 3 && rec.is_publish == true && rec.DateTimePublish < DateTime.Now && rec.Deleted == false
            orderby rec.DateTimePublish descending

            select new { record = rec, user = usr, pathToCat = cat.PathToImg, seo = seo }).Take(NumberRecords).AsEnumerable();