public static List <OrderItemsModel> Mapper(List <OrderItemsEntity> oieList) { if (oieList != null) { List <OrderItemsModel> oimList = new List <OrderItemsModel>(); foreach (var oie in oieList) { OrderItemsModel oim = new OrderItemsModel { Id = oie.Id, Quantity = oie.Quantity, Seller = UserMapper.Mapper(oie.Seller), Sku = SkuMapper.Mapper(oie.Sku), Order = OrderMapper.Mapper(oie.Order) }; oimList.Add(oim); } ; return(oimList); } return(null); }