Fluent.ComboBox.OnFocusedElementLostKeyboardFocus C# (CSharp) Method

        private void OnFocusedElementLostKeyboardFocus(object sender, KeyboardFocusChangedEventArgs e)
        {
            if (focusedElement != null) focusedElement.LostKeyboardFocus -= OnFocusedElementLostKeyboardFocus;
            focusedElement = Keyboard.FocusedElement;
            if (focusedElement != null)
            {
                focusedElement.LostKeyboardFocus += OnFocusedElementLostKeyboardFocus;
                if ((IsEditable) &&
                    (Items.Contains(ItemContainerGenerator.ItemFromContainer(Keyboard.FocusedElement as DependencyObject))))
                {
                    SelectedItem = ItemContainerGenerator.ItemFromContainer(Keyboard.FocusedElement as DependencyObject);
                }
            }
        }