can you write a program in c# so that when user mouseover on any existing unityui buttons it will show its class name limitation you cannot change the original button class for example you cannot atta

Certainly! Here's an example of how you can achieve this functionality using C# in Unity:

using UnityEngine;
using UnityEngine.EventSystems;
using UnityEngine.UI;

public class ButtonClassNameDisplayer : MonoBehaviour
{
    private Button[] buttons;

    private void Start()
    {
        // Get all the buttons in the scene
        buttons = FindObjectsOfType<Button>();

        // Add event listeners for each button
        foreach (var button in buttons)
        {
            button.gameObject.AddComponent<EventTrigger>();
            var eventTrigger = button.GetComponent<EventTrigger>();

            // Add pointer enter event listener
            var pointerEnter = new EventTrigger.Entry();
            pointerEnter.eventID = EventTriggerType.PointerEnter;
            pointerEnter.callback.AddListener((data) => { OnButtonPointerEnter(button); });
            eventTrigger.triggers.Add(pointerEnter);

            // Add pointer exit event listener
            var pointerExit = new EventTrigger.Entry();
            pointerExit.eventID = EventTriggerType.PointerExit;
            pointerExit.callback.AddListener((data) => { OnButtonPointerExit(button); });
            eventTrigger.triggers.Add(pointerExit);
        }
    }

    private void OnButtonPointerEnter(Button button)
    {
        Debug.Log("Mouse Over: " + button.GetType().Name);
    }

    private void OnButtonPointerExit(Button button)
    {
        Debug.Log("Mouse Exit: " + button.GetType().Name);
    }
}

In this script, we find all the buttons in the scene using FindObjectsOfType<Button>(). Then, we add an EventTrigger component to each button and add pointer enter and exit event listeners using EventTrigger.Entry. The event listeners call the OnButtonPointerEnter and OnButtonPointerExit methods, respectively, which log the class name of the button to the console.

Remember to attach this script to a GameObject in your Unity scene for it to work