Making a UI menu loop while navigating

Minor question: so I have a simple menu, say the pause menu, where the user can use the keyboard to navigate through the entire list. When the user reaches the top/bottom, the navigation loops around, and they can keep searching the list. All is good. My problem comes from trying to replicate this logic with a more dynamic menu of an unknown amount of buttons. Will I have to manually set the navigation every time to keep it looping, i.e.

     Button topButton = buttons[0];
     Button bottomButton = buttons[buttons.Length - 1];
     // Set top-button
     Navigation topNav = new Navigation();
     topNav.mode = Navigation.Mode.Explicit;
     topNav.selectOnUp = bottomButton;
     topNav.selectOnLeft = bottomButton;
     topNav.selectOnRight = buttons[1];
     topNav.selectOnDown = buttons[1];
     topButton.navigation = topNav;
     // Set bottom-button
     Navigation botNav = new Navigation();
     botNav.mode = Navigation.Mode.Explicit;
     botNav.selectOnUp = buttons[buttons.Length - 2];
     botNav.selectOnLeft = buttons[buttons.Length - 2];
     botNav.selectOnRight = topButton;
     botNav.selectOnDown = topButton;
     bottomButton.navigation = botNav;

It's not the worst but feels a bit messy, especially b/c I'm using object pooling so the menu order won't always be consistent....so I was wondering if there was anything cleaner. Thanks!