TestForEach.cs

using System.Collections.Generic;
using UnityEngine;

public class TestForEach : MonoBehaviour
{
    public List<TestClass> testClass;
    private void Start()
    {
        //ForEachを使った時の処理
        testClass.ForEach(test => test.Test()); 
        //foreachで書いたとき。
        foreach (var test in testClass) 
        { 
            test.Test(); 
        }
        
    }
    
}