Как добавить элемент в многомерный массив

public class ConsE : MonoBehaviour{
 GameObject Prefab;
 float TimeFromStart;
 bool HasSp;
 }
 
public class Sp : MonoBehaviour{
 List<ConsE> arr = new List<ConsE>();
 private void Start(){
  arr.Add(pr1,5,0);
  arr.Add(pr2,15,0);
  }
 }

arr.Add(new ConsE(pr1,5,0));

$arr=array();
$arr[]=array("Prefab"=>"en1","TimeFromStart"=>10,"HasSp"=>false);
$arr[]=array("Prefab"=>"en2","TimeFromStart"=>15,"HasSp"=>false);
$arr[]=array("Prefab"=>"en3","TimeFromStart"=>20,"HasSp"=>false);
 
foreach($arr as $vl){
 echo $vl["Prefab"]."<br>";
 echo $vl["TimeFromStart"]."<br>";
 echo $vl["HasSp"]."<br>-------<br>";
 }

List<ConsE> arr = new List<ConsE>(); // 0 элементов

ConsE cons = new ConsE(pr1,5,0);
arr.Add(cons);

arr.Add(new ConsE(pr1,5,0));

public class ConsE : MonoBehaviour
{
    GameObject Prefab;
    float TimeFromStart;
    bool HasSp;
 
    public ConsE(GameObject prefab, float timeFromStart, bool hasSp)
    {
        Prefab = prefab;
        TimeFromStart = timeFromStart;
        HasSp = hasSp;
    }
}

foreach (var cons in arr)
{
    ....
}

public class ConsE : MonoBehaviour
{
    public GameObject Prefab;
    public float TimeFromStart;
    public bool HasSp;
...............

arr.Add(new ConsE(eny3,2,false));