Why does the Unity console display multiple object status messages when serializing objects?

Question

C++ / C#

I read an article about object serialization in Unity.
Based on it, I wrote such a small prototype:

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using System;
using System.IO;
using System.Runtime.Serialization.Formatters.Binary;
using System.Runtime.Serialization;

[System.Serializable]
public class LevelInfo
{
    public int num;

}

public class Ser : MonoBehaviour
{
    public int numLevelWrite;
    public int numLevelRead;
    private LevelInfo LevelWrite;
    private LevelInfo LevelRead;

    private void Start()
    {
        LevelWrite = new LevelInfo();
        LevelRead = new LevelInfo();

        LevelWrite.num = numLevelWrite;
        LevelRead.num = numLevelRead;
    }

    private void Update()
    {
        if (Input.GetKeyDown(KeyCode.W))
        {
            Debug.Log("Before Write:\n" + "LevelWrite.num = " + LevelWrite.num + "\n LevelRead.num = " + LevelRead.num);
            Write(LevelWrite);
            Debug.Log("After Write/Before Read:\n" + "LevelWrite.num = " + LevelWrite.num + "\n LevelRead.num = " + LevelRead.num);
        }

        if (Input.GetKeyDown(KeyCode.R))
        {
            Debug.Log("After Write/Before Read:\n" + "LevelWrite.num = " + LevelWrite.num + "\n LevelRead.num = " + LevelRead.num);
            LevelRead = Read(LevelRead);
            Debug.Log("After Read:\n" + "LevelWrite.num = " + LevelWrite.num + "\n LevelRead.num = " + LevelRead.num);
        }

    }

    private void Write(LevelInfo lev)
    {
        BinaryFormatter formatter = new BinaryFormatter();

        FileStream StreanIn = new FileStream(@"C:\Users\LionsGate\Desktop\t.dat", FileMode.Create);
        formatter.Serialize(StreanIn, lev);

        StreanIn.Close();
    }

    private LevelInfo Read(LevelInfo lev)
    {
        BinaryFormatter formatter = new BinaryFormatter();

        FileStream StreanOut = new FileStream(@"C:\Users\LionsGate\Desktop\t.dat", FileMode.Open);
        lev = (LevelInfo)formatter.Deserialize(StreanOut);

        StreanOut.Close();

        return lev;
    }
}

But when I run PlayMode, I get this feed of messages in the console.

Then I close, restart Unity, change the values ​​of open variables and get a different feed.

I looked in the debugger. the values ​​change. But it is not clear why Debug.Log() is called twice every time and what happens in general? Unity creates its own instance of a class? But after all, private class variables do not directly contact the inspector ... In general, help me figure it out.

Answer 1

I officially declare that I'm stupid. The script was attached to two objects. Here is the message displayed twice...