Hello,

This tutorial demonstrates how to simulate a TreeList control with load on demand hierarchy:

https://docs.telerik.com/devtools/winforms/knowledge-base/simulate-treelist-load-on-demand 

Regards,
Dess | Tech Support Engineer, Principal
Progress Telerik

Here is the related forum post: http://www.telerik.com/forums/columns-in-tree-view

RadGridView with self-reference hierarchy is what we offer to achieve TreeList scenario: http://docs.telerik.com/devtools/winforms/gridview/hierarchical-grid/self-referencing-hierarchy

If you have any additional input, why there is a need for a separate component, we will happily discuss it.

Discussion is available here in the comments and in the following forum thread: RadGridView with self-reference hierarchy http://docs.telerik.com/devtools/winforms/gridview/hierarchical-grid/self-referencing-hierarchy