nature_net.user_controls.custom_listbox.get_all_activities C# (CSharp) Метод

        public void get_all_activities(object arg, DoWorkEventArgs e)
        {
            e.Result = (object)(new List<Activity>());
            try
            {
                naturenet_dataclassDataContext db = new naturenet_dataclassDataContext();
                var r = from a in db.Activities
                        where (a.name != "Free Observation") && (a.name != "Design Idea")
                        select a;
                if (r != null)
                {
                    List<Activity> activities = r.ToList<Activity>();
                    e.Result = (object)activities;
                }
                else
                {
                    e.Result = (object)(new List<Activity>());
                }
            }
            catch (Exception ex)
            {
                log.WriteErrorLog(ex);
            }
        }