asp.net - I couldn't add items in radiobutton list with Item.Add(item) -

i tried add radio button list items dynamically code , got error:

system.web.ui.webcontrols.radiobutton' not contain definition 'items'and no extension method 'items' accepting first argument of type 'system.web.ui.webcontrols.radiobutton' found (are missing using directive or assembly reference?)

my code is:

radiobutton:  id="lstborder"  

in pageload event:

createed listitem objects item. lstborder.items.add(item; 

i didn't part if items not property in radio button list? how fix it?

try in way,

lstborder.datasource = item; lstborder.databind(); 

as per code, need add "item"(listitem) radiobuttonlist

lstborder.items.add(item);