private void Button_Click_MoveDown(object sender, RoutedEventArgs e)
{
int index = PluginList.SelectedIndex;
if (index >= 0)
{
IList list = PluginList.ItemsSource as IList;
if (index < (list.Count - 1))
{
object item = list[index];
list.RemoveAt(index);
index++;
list.Insert(index, item);
PluginList.SelectedIndex = index;
PluginList.ScrollIntoView(item);
}
}
}