How to destroy only one GameObject???

The code I'm using is ~~

 using UnityEngine;

 public class HealthScript2 : MonoBehaviour {


     /// <summary>
     /// Total hitpoints
     /// </summary>
     public int hp = 1;

     /// <summary>
     /// Enemy or player?
     /// </summary>
     public bool isEnemy = true;

     /// <summary>
     /// Inflicts damage and check if the object should be destroyed
     /// </summary>
     /// <param name="damageCount"></param>
     public void Damage(int damageCount)
     {
         hp -= damageCount;

         if (hp <= 0)
         {
             // Dead!
             Destroy(gameObject);
         }
     }

     void OnTriggerEnter2D(Collider2D otherCollider)
     {
         // Is this a shot?
         ShotScript shot = otherCollider.gameObject.GetComponent<ShotScript>();
         if (shot != null)
         {
             // Avoid friendly fire
             if (shot.isEnemyShot != isEnemy)
             {
                 Damage(shot.damage);

                 // Destroy the shot
                 Destroy(shot.gameObject); // Remember to always target the game object, otherwise you will just remove the script
             }
         }
     }
 }

Whenever I destroy one object, all the other objects vanish also!?~~ How could I make it so only the targeted object vanishes?