Microsoft.Windows.Controls.Ribbon.RibbonMenuButton.OnIsKeyboardFocusWithinChanged C# (CSharp) Method

        protected override void OnIsKeyboardFocusWithinChanged(DependencyPropertyChangedEventArgs e)
        {
            // If IsKeyboardFocusWithin has become true, then do not
            // call base.OnIsKeyboardFocusWithinChanged right away.
            // Defer the bases call until DropDown gets opened or
            // one of the descendants get focus.
            if (!IsKeyboardFocusWithin)
            {
                PseudoIsKeyboardFocusWithin = false;
                base.OnIsKeyboardFocusWithinChanged(e);
            }
        }