Get the index of the selected item in longlistselector

Question

I have a long list selector

Answer 1

sender is going to be who sent the fact that this event occurred. See SelectionChangedEventArgs at MSDN to know that you'll want to do e.AddedItems[0] if single-select list, or if multi-select list, you'll need to loop over it:

foreach(var item in e.AddedItems)