Unity, simple one way value binding example

TestReactive.cs

using System;
using UnityEngine;

// Note : simple one way value binding example
public class TestReactive : MonoBehaviour
{
    public string Message
    {
        get => message;
        set => SetWithNotify(ref message, value, nameof(Message), OnValueChanged);
    }

    public int Number
    {
         get => number;
         set => SetWithNotify(ref number, value, nameof(Number), OnValueChanged);       
    }

    private string message = "This is default message";
    private int number = 0; 
    
    // Note : react on start (default value)
    private void Start()
    {
        OnValueChanged(nameof(Message));
        OnValueChanged(nameof(Number));
    }
    
    // Note : react on press 'Space' key
    private void Update()
    {
        if (Input.GetKeyDown(KeyCode.Space))
        {
            Message = $"Pressed at in-game time : {Time.time}";
            Number += 1;
        }
    }

    private void SetWithNotify<T>(ref T field, T value, string propertyName, Action<string> onValueChanged = null, bool checkChanged = true)
    {
        bool isValid = (checkChanged) ? !Equals(field, value) : true;

        if (isValid)
        {
            field = value;
            onValueChanged?.Invoke(propertyName);
        }
    }
        
    private void OnValueChanged(string propertyName)
    {
        switch (propertyName)
        {
            case nameof(Message):
            {
                Debug.Log(Message);
            }
            break;

            case nameof(Number):
            {
                Debug.Log(Number);
            }
            break;
        }
    }
}