public ActionResult _ajax_StatUsers(int course, int company, int department) { var customCourseIds = StatisticsRepository.MasterId2customId(course, company, department, 0).Distinct().ToList(); List <StatUsersModel> stats = new List <StatUsersModel>(); for (var i = 0; i < customCourseIds.Count(); i++) { stats.AddRange(StatisticsRepository.GetStatUsers(course, customCourseIds[i], company, department)); } var json = new JavaScriptSerializer().Serialize(stats.Distinct()); return(Json(json, JsonRequestBehavior.AllowGet)); }