// DataFile.cs
using UnityEngine;

public class DataFile : MonoBehaviour
{
    public Camera camera1;
    public int number;
    public string str;
}
// SerializationControl.cs
using UnityEngine;
using System.IO;

public class SerializationControl : MonoBehaviour
{
    string filePath;

    void Start()
    {
        print(Application.persistentDataPath);
        filePath = Path.Combine(Application.persistentDataPath, "datafile.json");
    }
    
    void Update()
    {
        if (Input.GetMouseButtonDown(0))
        {
            DataFile c = FindObjectOfType<DataFile>();
            string str = JsonUtility.ToJson(c);
            File.WriteAllText(filePath, str);
            print("Serialize");

        }
        else if (Input.GetMouseButtonDown(1))
        {
            DataFile c = FindObjectOfType<DataFile>();
            string str = File.ReadAllText(filePath);
            JsonUtility.FromJsonOverwrite(str, c);
            print("Deserialize");
        }
    }
}