How to set a delegate to a Unity button when creating it?

Question

C++ / C#

I make a kind of inventory object by destroying the object and creating a Prefab and setting up its parts.

public GameObject InventoryItem;
    public Sprite sprites;
    public void Use()
    {
       GameObject toy = Instantiate(InventoryItem,GameObject.Find("Inventory").transform);
        toy.GetComponent<Image>().sprite = sprites;
        toy.AddComponent(typeof(Axe));
        //От тута не происходит то что я себе представляю.
        toy.transform.Find("ButtonUse").GetComponent<Button>().onClick.AddListener(delegate() { toy.GetComponent<Axe>().UseOnPick(); });

        Destroy(gameObject);
    }

Here is the delegate itself:

public void UseOnPick()
    {
        Text textField = GameObject.Find("Text").GetComponent<Text>();
        textField.text = "Это обычный Топор";
        new WaitForSeconds(5);
        textField.text = "";
    }

However, the buttons present in the prefab refuse to accept the delegate.


What kung fury technique to use?