public static IEnumerable <Item> GetItems(string id = "%", string name = "%") { var reader = InventoryDb.GetItems(id, name).CreateDataReader(); while (reader.Read()) { var pId = int.Parse(reader["Item_ID"].ToString()); var pName = reader["ProductName"].ToString(); var pStock = int.Parse(reader["Stock"].ToString()); var pPrice = decimal.Parse(reader["Price"].ToString()); yield return(new Item(pId, pName, pStock, pPrice)); } }