public void previousItem() { if (Announcements.IndexOf(SelectedItem) > 0) { SelectedItem = Announcements.ElementAt(Announcements.IndexOf(SelectedItem) - 1); } }
public void nextItem() { if (Announcements.IndexOf(SelectedItem) < Announcements.Count - 1) { SelectedItem = Announcements.ElementAt(Announcements.IndexOf(SelectedItem) + 1); } }