c# - How to get radlistview items if you use paging

Question

I'm using radlistview in my asp.net project . The problem that when I have to get all items of radlistview it return only items of the current page.

Example :

radlistview2.Items.ToList();

Output : I got only 10 elements which are in the first page

My Question is :

How To get all items in radlistview ???