public List <SelectListItem> GetSaleOrderForSelectList(Guid?id)
{
List <SelectListItem> selectListItem = null;
List <SaleOrder> saleOrderList = _saleOrderRepository.GetSaleOrderForSelectList(id);
return(selectListItem = saleOrderList != null ? (from saleOrder in saleOrderList
select new SelectListItem
{
Text = saleOrder.SaleOrderNo,
Value = saleOrder.ID.ToString(),
Selected = false
}).ToList() : new List <SelectListItem>());
}