using arrayList as DataSource for Gridview

Question

Hi, Im trying to implement this way of populating a gridview https://aspdotnetcodebook.blogspot.com.ar/2008/07/using-arraylist-as-datasource-for.html but using 2 layer architecture (UI - BO).

BO has 2 class (Person.cs and PersonList.cs)

I want to move the method that create/retrieve the Session and call it from the UI (Default.aspx.cs in the page load). Basically the same as in the page but using a layer for the objects. 

Any recommendation?