how to delete buttons listener

Unity Engine
1

I’m making three button that gives player random upgrade selection
So when player level up script choose random upgrade and
put diffrent onClick.AddListener for each button
and when I click button
onClick.RemoveListener activate to clear button for next level up
but problem is button which I didn’t select
onClick.RemoveListener only affect in button which I select
so another button’s listener is still remaining and it makes wrong upgrade result in next level up
Sadly I don’t have any idea how to remove unclicked button’s listener
Is there any way to remove all button’s listener when I choose upgrade?

here is my script sample for upgrade

//Onclick add listener by switch

            case "ATK Upgrade":
                B1.onClick.AddListener(ATKLevelUp);
                b = "null";
                break;

//ATK upgrade

    void ATKLevelUp()
    {
        if (StatManager.LevelChanged == false)
        {
            StatManager.ATK = StatManager.ATK + 1f;
            StatManager.LevelChanged = true;
        }
        B1.onClick.RemoveListener(ATKLevelUp);
    }
2

Have you tried B2.onClick.RemoveAllListeners(); ?

3

yes Button2 also have Remove listener
but if I select button1 at level up
then b2.onClick dosen’t work because there is only one chance to click button per level up :frowning: