foreach (var obj in GameObject.FindGameObjectsWithTag("Cube1"))

{
ObjectsPositions.Add(obj);
}

foreach (var obj in GameObject.FindGameObjectsWithTag("Cube1"))

{
myVector3 i = new myVector3()
i.x = obj.transform.position.x;
i.y = obj.transform.position.y;
i.z = obj.transform.position.z;
ObjectsPositions.Add(i);
}

void List<myVector3>Load()

public List<myVector3> Load()

void Save(List<myVector3> positions)
{

        BinaryFormatter formatter = new BinaryFormatter();

            using (FileStream stream = new FileStream(Application.persistentDataPath + "/save.sav", FileMode.Create))
            {
                formatter.Serialize(Application.persistentDataPath + "/save.sav", positions);
            }
}

public List<myVector3> Load()
{
List<myVector3> objects;
BinaryFormatter formatter = new BinaryFormatter();

            using (FileStream stream = new FileStream(Application.persistentDataPath + "/save.sav", FileMode.Open))
            {
                objects = (List<myVector3>)formatter.Deserialize(stream);
            }
return objects;
}

[System.Serializable]
public Dictionary<string, Level> levels = new Dictionary<string, Level>();
public struct Corpse
{
    public string type;
    public int x;
    public int y;
}

[System.Serializable]
public struct Point
{
    public float X;
    public float Y;
    public float Z;
    public Point(float x, float y, float z)
    {
        X = x;
        Y = y;
        Z = z;
    }
}
[System.Serializable]
public struct Enemy
{
    public string type;
    public Point pos;
    public Point rot;
    public int hp;
    public AI_cult_1.State state;
    public int ammo;
    public bool vis;
}

[System.Serializable]
public struct Decoration
{
    public string type;
    public Point pos;
    public Point rot;
}

[System.Serializable]
public struct Level
{
    public List<Corpse> corpses;
    public List<Enemy> enemies;
    public List<Decoration> decorations;
}

Level lvl = new Level();

        lvl.decorations = GetAllDecor();//берем все декорации на сцене
        lvl.enemies = GetAllEnemies();//находим всех противников на сцене
        
        if (!levels.ContainsKey(SceneManager.GetActiveScene().name)) //если нет уровня в дикте
        {levels.Add(SceneManager.GetActiveScene().name,lvl);}        //то создадим его
        else
        {levels[SceneManager.GetActiveScene().name]=lvl;} //а если есть - перезапишем

    public List<Decoration> GetAllDecor()
    {
        List<Decoration> lol = new List<Decoration>();
        GameObject[] decors = GameObject.FindGameObjectsWithTag("Decoration");
        foreach (GameObject decor in decors)
        {
            Decoration a = new Decoration();
            a.type = decor.name;
            a.pos = new Point(decor.transform.position.x,decor.transform.position.y,decor.transform.position.z);
            a.rot = new Point(decor.transform.eulerAngles.x,decor.transform.eulerAngles.y,decor.transform.eulerAngles.z);
            lol.Add(a);
        }
        
        return lol;

    }

    public List<Enemy> GetAllEnemies()
    {
        List<Enemy> lol = new List<Enemy>();
        AI_cult_1[] enemies_on_scene = Object.FindObjectsOfType<AI_cult_1>();
        foreach (AI_cult_1 enemy in enemies_on_scene)
        {
            Enemy a = new Enemy();
            a.type = enemy.name;
            a.pos = new Point(enemy.transform.position.x,enemy.transform.position.y,enemy.transform.position.z);
            a.rot = new Point(enemy.transform.eulerAngles.x,enemy.transform.eulerAngles.y,enemy.transform.eulerAngles.z);
            a.ammo = enemy.countAmmo;
            a.hp = enemy.hp;
            a.state = enemy.state;
            a.vis = enemy.vis;
            lol.Add(a);
        }

        BinaryFormatter formatter = new BinaryFormatter();

            using (FileStream stream = new FileStream(Application.persistentDataPath + "/save.sav", FileMode.Create))
            {
                formatter.Serialize(Application.persistentDataPath + "/save.sav", levels);
            }

BinaryFormatter formatter = new BinaryFormatter();

            using (FileStream stream = new FileStream(Application.persistentDataPath + "/save.sav", FileMode.Open))
            {
                levels = (Dictionary<string, Level>)formatter.Deserialize(stream);
            }

class Program
{
    static void Main(string[] args)
    {
        dynamic stud = new Student();

        stud.Init();
        stud.DisplayStudentInfo(1);
    }
}

public class Student
{
    public void Init()
    {
        Console.WriteLine("Студент инициализирован");//или что тебе надо в методе Init
    }
    public void DisplayStudentInfo(int id)
    {
        Console.WriteLine(id);
    }
}