Android and PlayerPrefs.Save

Question? How would I get my code here to save my highscore int with PlayerPrefs.Save

 using UnityEngine;
 using System.Collections;
 
 public class Score : MonoBehaviour {
 
     static int score = 0;
     static int highScore = 0;
 
 
     static public void AddPoint() {
         score++;
 
         if(score > highScore) {
             highScore = score;
         }
     }
     
     void Start() {
         highScore = PlayerPrefs.GetInt ("highScore", 0);
     }
 
     void OnDestroy() {
         PlayerPrefs.SetInt ("highScore", highScore);
     }
 
     void Update () {
         GetComponent<GUIText> ().text = "Score: " + score + "\nHigh Score: " + highScore;
     }
 }