Detect save change in Editor mode - Unity3D C#

DetectSaveChange.cs

using UnityEngine;
using System.Collections;
using System.IO;


namespace TaiNgo
{
	[ExecuteInEditMode]
	public class Activator : MonoBehaviour {


#if UNITY_EDITOR
		string currentOpenScene = "";

		void OnEnable()
		{
			Debug.Log("OnEnable");
			var m_SceneFileWatcher = new FileSystemWatcher(Path.GetFullPath("Assets"), "*.unity"); 
			m_SceneFileWatcher.NotifyFilter = NotifyFilters.LastWrite; 
			m_SceneFileWatcher.EnableRaisingEvents = true; 
			m_SceneFileWatcher.Changed += OnSceneFileWatcher_Changed; 

			currentOpenScene = Path.GetFileNameWithoutExtension(UnityEditor.EditorApplication.currentScene);
		}
		
		void OnSceneFileWatcher_Changed(object sender, FileSystemEventArgs e) 
		{
			var sceneName = Path.GetFileNameWithoutExtension(e.FullPath);
			if(currentOpenScene.ToLower() == sceneName.ToLower())
			{
				
			}
		}
#endif
	}
}