//urgent checks var q_uvu = db.d_events .AsNoTracking() .Where(x => x.event_type.ToLower() == "app_verify" && x.date_apt_exe == null && (x.deleted == null || !(bool)x.deleted)) .Select(s => new { s.id_person, idApt = (string.IsNullOrEmpty(s.id_event) ? "" : "!") }).Distinct();