//-------------------------------------------Start Work With Study>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> public IEnumerable <SelectListItem> UIGetUsedStudies() { var returnSelectListItem = new List <SelectListItem>(); List <DalStudy> UsedStudies = bll.BllGetUsedStudies().ToList(); var items = new List <SelectListItem>(); foreach (var item in UsedStudies) { { items.Add(new SelectListItem { Value = item.St_Id.ToString(), Text = item.St_Type }); } } returnSelectListItem = items; return(returnSelectListItem); }