리스트에서 해당 인덱스부터 마지막까지 제거 하기

using UnityEngine;
using System.Collections;
using System.Collections.Generic;

public class Block
{
 private int _id;

 public Block(int id)
 {
  this._id = id;
 }

 public int GetID()
 {
  return this._id;
 }
}

public class Test : MonoBehaviour {

 private List<Block> list;

 // Use this for initialization
 void Start () {
  list = new List<Block> ();
  for (int i = 0; i<5; i++) {
   Block block = new Block (i);
   list.Add (block);

   Debug.Log(i.ToString());
  }

  int idx = 0;

  foreach (Block b in list) {
   if(b.GetID() == 3)
   {
    idx = list.IndexOf(b);
   }
  }

  Debug.Log (idx.ToString ());
  list.RemoveRange(idx, list.Count - idx);

 

  Debug.Log (list.Count);

  foreach (Block b in list) {
   Debug.Log(b.GetID().ToString());
  }

 

 }
 
 // Update is called once per frame
 void Update () {
 
 }
}