I need my script to load and save my players score to a text file . When I attach the script to a gameobject the script either is not found or it just prints 5,4,3,2,1 or all )0's.

 using System.Runtime.Serialization.Formatters.Binary;
 using System.Collections;
 using UnityEngine.UI;
 using UnityEngine;
 using System.IO;
 using System;
 using UnityEngine.SocialPlatforms.Impl;
 using System.Collections.Generic;
 using System.Linq;
 
 public class HighScores : MonoBehaviour
 {
     private int highscore;
     public Text HighScoretext;
     private string filepath;
     public List<Highscore> Scores { get; private set; }

     void Start()
     {
         this.filepath = Path.Combine(Application.dataPath, "/" + "score.txt");

         if (File.Exists(filepath))
             this.LoadScores();

         this.Scores = new List<Highscore>();
         highscore = this.Scores[4].score;
     }
 
     void LoadScores()
     {
         int i = 0;
         StreamReader sr = null;
         try
         {
             sr = new StreamReader(Application.dataPath + "/" + "score.txt");
             string info = sr.ReadLine();
             if (info == null)
             {
                 throw new FileNotFoundException();
             }
             while (info != null)
             {
                 string[] myinfo = info.Split(',');
                 // string initials = myinfo[0];
                 //int score = int.Parse(myinfo[1]);
                 Scores.Add(new Highscore(int.Parse(myinfo[1]), myinfo[0]));

                 info = sr.ReadLine();
                 i++;
             }
         }
         catch (FileNotFoundException fnfe)
         {
             if (sr != null)
                 sr.Close();
             Debug.Log("File not Found..." + fnfe.Message);
             createFile();
         }
         catch (Exception e)
         {
             Debug.Log("File not found ..." + e.Message);
             if (sr != null)
                 sr.Close();
             createFile();
         }
         finally
         {
             if (sr != null)
                 sr.Close();
         }
     }

     private void createFile()
     {
         StreamWriter sw2 = new StreamWriter(Application.dataPath + "/" + "score.txt");
         List<int> highscores = new List<int>();
         highscores.Add(5);
         highscores.Add(4);
         highscores.Add(3);
         highscores.Add(2);
         highscores.Add(1);
         foreach (int p in highscores)
             sw2.WriteLine(p);
         sw2.Close();
     }

     public void UpdateScores(int score)
     {
         if (score > this.Scores[4].score)
         {
             highscore = score;
   
             this.Scores = this.Scores.OrderByDescending(x => x).Take(5).ToList();
             this.SavesScores();
         }
     }
 
     private void SavesScores()
     {
         using (StreamWriter we = new StreamWriter(Application.dataPath + "/score.txt"))
         {
             foreach (Highscore score in Scores)
             {
                 we.WriteLine();
             }
         }
     }
 }

 public struct Highscore : IComparable
 {
     public int score;
     public string initials;

     public Highscore(int s, string i)
     {
         score = s;
         initials = i;
     }

     public int CompareTo(Highscore other)
     {
         return -1 * this.score.CompareTo(other.score);
     }

     public override string ToString()
     {
         return initials + "," + score;
     }
 }