Winforms: Which event to fire? combobox.selectedindexchanged OR bindingsource.currentchanged

Question

Assume we have a Combobox in a winforms application which its items bound to a Bindingsource.

I need to fire an event when the user changes the selected item in the combobox.

Should I handle the combobox.selectedindexchanged event or bindingsource.currentchanged event. Which is better in case of performance or anything else?

I've searched a lot to find an article or something about it, but can't find something straight and clear. I appreciate any suggestion or workaround.

UPDATE

I need to call a function base on the selected object ID after user select an Item from combobox. (ID is accessible from both Combobox1.SelectedValue and bindingSource1.Current.ID). In this case which event shouldI choose?

Answer 1

After all, I am getting to know it should be better to use Combobox.SelectedIndexChanded event, because I am interacting with a user and looking for a response from UI. Although here the events do the same for me, but Bindingsource.CurrentChanged event can be used in case I wanted to track the current object changes from anywhere like a list change or something, not exactly the UI. Its better to use combobox events here I believe.