Link var with GameObjects

I want to link var with gameobject, Can i do it ? I can do it by using

using UnityEngine; using System.Collections;

public class vc : MonoBehaviour {

 public GameObject player;
 public zs[] _enemy;

 // Use this for initialization
 void Start () {
     
 }
 
 // Update is called once per frame
 void Update () {

     var objects = GameObject.FindGameObjectsWithTag("enemy");
     var objectCount = objects.Length;
 //    objects = _enemy; here i want to link var with the game object _enemy which it my problem
     Debug.Log(objectCount);
     foreach (var obj in objects) {
         if(GameObject.FindWithTag("enemy").activeSelf == false)
            {
             // here obj.delete_enemy();
            }
     }

     foreach(var e in _enemy)    {
         if (e.enemy.activeSelf == false) // this one run well without problem can i do same think with above one ?
             {
             e.delete_enemy();
             Debug.Log("delete");
 
             }
     }

}