I see.. thanks for your solution, it works. Great! Wish users can set Series.DataSource = (IList) or (List<T>) and set DataMember as a propertyname directly in a future version of TeeChart as my suggestion. It will make much better coding-experiences than write a cycle myself. However, I can use it ...

I use LinQ2SQL to access database in my project, and most of query results is IQueryable<> or List<>. But it seems Teechart cannot work with such datasource. I don't want to convert my List<> source to DataTable, that takes a horribly long time. Another way, writing an ADO link to get DataTable spec...