In order to get the currently selected item you can use the SelectionChanged
event of RadCarousel
sender, SelectionChangeEventArgs e)
var selectedItem = e.AddedItems
// Do something with the SelectedItem
I attached a sample project that demonstrates how to set initially the selected item and that it will trigger the mentioned event.
I hope this helps.
Check out the Telerik Platform - the only platform that combines a rich set of UI tools with powerful cloud services to develop web, hybrid and native mobile apps.