Save GUI List to my Text File

Hi everybody! I need to store my LeaderBoard data generated in the UI to a text file in my oriject, how can I do that?

My Script LEADERBOARD:

public class HighScoreManager : MonoBehaviour {

 private static HighScoreManager m_instance;
 private const int LeaderboardLength = 10;

 public static HighScoreManager _instance
 {
     get
     {
         if (m_instance == null)
         {
             m_instance = new GameObject("HighScoreManager").AddComponent<HighScoreManager>();
         }
         return m_instance;
     }
 }

 void Awake()
 {
     if (m_instance == null)
     {
         m_instance = this;
     }
     else if (m_instance != this)
         Destroy(gameObject);

     DontDestroyOnLoad(gameObject);
 }

 public void SaveHighScore(string name, float score)
 {
     List<Scores> HighScores = new List<Scores>();

     int i = 1;
     while (i <= LeaderboardLength && PlayerPrefs.HasKey("HighScore" + i + "score"))
     {
         Scores temp = new Scores();
         temp.score = PlayerPrefs.GetFloat("HighScore" + i + "score");
         temp.name = PlayerPrefs.GetString("HighScore" + i + "name");
         HighScores.Add(temp);
         i++;
     }
     if (HighScores.Count == 0)
     {
         Scores _temp = new Scores();
         _temp.name = name;
         _temp.score = score;
         HighScores.Add(_temp);
     }
     else
     {
         for (i = 1; i <= HighScores.Count && i <= LeaderboardLength; i++)
         {
             if (score < HighScores[i - 1].score)
             {
                 Scores _temp = new Scores();
                 _temp.name = name;
                 _temp.score = score;
                 HighScores.Insert(i - 1, _temp);
                 break;
             }
             if (i == HighScores.Count && i < LeaderboardLength)
             {
                 Scores _temp = new Scores();
                 _temp.name = name;
                 _temp.score = score;
                 HighScores.Add(_temp);
                 break;
             }
         }
     }

     i = 1;
     while (i <= LeaderboardLength && i <= HighScores.Count)
     {
         PlayerPrefs.SetString("HighScore" + i + "name", HighScores[i - 1].name);
         PlayerPrefs.SetFloat("HighScore" + i + "score", HighScores[i - 1].score);
         i++;
     }

 }

 public List<Scores> GetHighScore()
 {
     List<Scores> HighScores = new List<Scores>();

     int i = 1;
     while (i <= LeaderboardLength && PlayerPrefs.HasKey("HighScore" + i + "score"))
     {
         Scores temp = new Scores();
         temp.score = PlayerPrefs.GetFloat("HighScore" + i + "score");
         temp.name = PlayerPrefs.GetString("HighScore" + i + "name");
         HighScores.Add(temp);
         i++;
     }

     return HighScores;
 }

 public void ClearLeaderBoard()
 {
     //for(int i=0;i<HighScores.
     List<Scores> HighScores = GetHighScore();

     for (int i = 1; i <= HighScores.Count; i++)
     {
         PlayerPrefs.DeleteKey("HighScore" + i + "name");
         PlayerPrefs.DeleteKey("HighScore" + i + "score");
     }
 }

 void OnApplicationQuit()
 {
     PlayerPrefs.Save();
 }

}

public class Scores { public float score;

 public string name;

}

My Script SAVE/LOADSCORES:

public class LoadScores : MonoBehaviour {

 //public Text username;
   
 //public Text time;
 List<Scores> highscore;



   
 int someInt = 40;
 
 // Use this for initialization
 void Start () {
     int i ;

     highscore = new List<Scores>();

     var fileName = "MyFile.txt";
     if (File.Exists(fileName))
     {
         File.Delete(fileName);
         Debug.Log(fileName + " Cancellato.");
         
     }
     var sr = File.CreateText(fileName);
     sr.WriteLine("Classifica1:      ");
    
     sr.WriteLine("I can write ints {0} or floats {1}, and so on.",
       1, 4.2);
     sr.Write(PlayerPrefs.GetString("Username"));

     sr.Close();
 }

 

     void OnGUI()
 {
     GUILayout.Space(20);
     if (GUILayout.Button("Clear Leaderboard"))
     {
         HighScoreManager._instance.ClearLeaderBoard();
     }


     highscore = HighScoreManager._instance.GetHighScore();

     highscore.ToString();
     
     GUILayout.Space(150);

     GUILayout.BeginHorizontal();
     GUILayout.Label("Name", GUILayout.Width(Screen.width / 2));
     GUILayout.Label("Scores", GUILayout.Width(Screen.width / 2));
     GUILayout.EndHorizontal();

     GUILayout.Space(25);

     foreach (Scores _score in highscore)
     {
         GUILayout.BeginHorizontal();
         GUILayout.Label(_score.name, GUILayout.Width(Screen.width / 2));
         GUI.skin.label.fontSize = someInt;


         GUILayout.Label("" + _score.score, GUILayout.Width(Screen.width / 2));

         GUI.skin.label.fontSize = someInt;
         GUILayout.EndHorizontal();
     }

     
 }
     public void Ceck()
 {
     highscore = HighScoreManager._instance.GetHighScore();
     Debug.Log("CDCDCDCDC");
 }

       // Update is called once per frame
     void Update () {

 }

}

PLS HEEEEEELP!