private void LoadAssignedList() { using (var helper = new DbHelper.Subject()) { var assignedCourses = helper.ListCoursesOfStructure(YearId, SubYearId); //ViewState["SavedCourses"] = assignedCourses; foreach (var subject in assignedCourses) { lstAssignedCourses.Items.Add(new ListItem() { Value = subject.Id + "_" + subject.CategoryId + "_" + subject.Credit + "_" + subject.IsElective.ToString(), Text = subject.Name }); } } }