Add difference between List and Array

StructOwner.cs

using System.Collections.Generic;
using UnityEngine;

public class StructOwner : MonoBehaviour {
    
    public MyStruct myStruct;
    public MyStruct myStruct2;

    public NestedClass nestedClass;

    public List<MyStruct> list;
    public MyStruct[] array;

    void Awake()
    {
        myStruct.stringValue = "origin";
        myStruct2.stringValue = "origin";
        
        list = new List<MyStruct>();
        list.Add(new MyStruct("one"));
        list.Add(new MyStruct("two"));
        // index가 temp value에 접근하므로 원본 데이터 수정 불가
        // List 사용시 인자가 구조체면, 더미 값이므로 set 못함
        //list[1].stringValue = "aa";
        Debug.Log(list[1].stringValue);
        
        array = new MyStruct[2];
        array[0]= new MyStruct("one");
        array[1]= new MyStruct("two");
        array[1].stringValue = "aa";

        ChangeAndPrint(myStruct);
        ChangeAndPrint(ref myStruct2);
        
        // result
        // copy - s:copy String, myStruct:origin
        // ref - s:ref String, myStruct:ref String
    }

    void ChangeAndPrint(MyStruct s)
    {
        s.stringValue = "copy String";
        Debug.Log($"copy - s:{s.stringValue}, myStruct:{myStruct.stringValue}");
    }

    void ChangeAndPrint(ref MyStruct s)
    {
        s.stringValue = "ref String";
        Debug.Log($"ref - s:{s.stringValue}, myStruct:{myStruct2.stringValue}");
    }

    [System.Serializable]
    public class NestedClass {
        public string internalString;
    }
}


[System.Serializable]
public struct MyStruct {
    public string stringValue;

    public MyStruct(string initValue)
    {
        stringValue = initValue;
    }
}