“IsSynchronizedWithCurrentItem” helps the selector controls synchronize with current item, which confuses me with “selected item”. I really can not see the point of current item, since we have access to the selected item.
MS gives an example of the use of the attribute, saying “suppose that there are two ListBox controls with their ItemsSource property set to the same source. Set IsSynchronizedWithCurrentItem to true on both list boxes to ensure that the selected item in each ListBox is the same.” I tried it. It seemed not to work as it said. Anyway, I don’t quite care about it, since I do not use it at all.
Here what I say about it is the annoying result if you set this attribute of a list box to true. Then no matter if or not the SelectedItem is set to -1, the first item will be always selected, which pissed me off.
I do not like it, therefore I always turn it off.