How to force a WPF binding to refresh?

Question

I have got a combo box with items source attached using simple binding. Is there any way to refresh this binding once combo box is loaded?

Answer 1

MultiBinding friendly version...

private void ComboBox_Loaded(object sender, RoutedEventArgs e)
{
    BindingOperations.GetBindingExpressionBase((ComboBox)sender, ComboBox.ItemsSourceProperty).UpdateTarget();
}