Listbox SelectedIndexChanged event

[There is always the way to do it but I dont know]

I want to add a delegate to each listbox (10 of total on one page), in order to handle selectedIndexChanged event as following: lstbox.SelectedIndexChanged += new EventHandler(OnSelectedIndexChanged); private void OnSelectedIndexChanged(object sender, EventHandler e) { } I got error like this: Error 1 No overload for 'OnSelectedIndexChanged' matches delegate 'System.EventHandler' Can some one help me. Or any suggestion on what's the best way to handle 10 data list on one page. (display and editable). Thank you in advance.