Cant find out how to make a highscore

I can't find a way to fix this script every time I play the game the score goes up normally but the high score doesn't go up or change or do anything.

My code:

Code (CSharp):

1.  
2. using UnityEngine;
3. using UnityEngine.UI;
4. using System.Collections;
5.  
6. public class Score : MonoBehaviour
7. {
8.     public Text field;
9.     public int currentDisplayScore = 0;
10.     public Text highScore;
11.  
12.     void Start()
13.     {
14.         highScore.text = PlayerPrefs.GetInt("HighScore", 0).ToString();
15.         StartCoroutine(CountUp());
16.     }
17.  
18.     IEnumerator CountUp()
19.     {
20.  
21.  
22.         if (currentDisplayScore > PlayerPrefs.GetInt("HighScore", 0))
23.         {
24.             PlayerPrefs.SetInt("HighScore", currentDisplayScore);
25.             highScore.text = currentDisplayScore.ToString();
26.         }
27.  
28.         while (true)
29.         {
30.             currentDisplayScore++;
31.             field.text = currentDisplayScore + "";
32.             yield return new WaitForSeconds(1f);
33.         }
34.     }
35.  
36. }
37.  
38.  

 

You are never updating your highscore in your "while(true)", just move your if statement in the while loop

 

Thank you so much