Game highscore file writing

Hello. I am making a snake game in unity and I am trying to save the user score to a CSV file using C# StreamWritter but my script I have written seems to stop once it reaches the file writing.

Highscore script:

 using UnityEngine;
  using System.Collections;
  using System.IO;
  
  public class Highscore : MonoBehaviour {
  
      public GameObject CO;
      public GUInamecarry GNC;
      
  
      public struct Highscores
      {
          public string name;
          public int score;
          public string date;
      }
      
      void Awake () {
      CO = GameObject.FindWithTag("empty");
      GNC = CO.GetComponent<GUInamecarry> ();
      }
  
      // Use this for initialization
      void Start () {
         Highscores[] hs = new Highscores[6];
         hs[1].name = GNC.name;
         hs[1].score = GNC.score;
         hs[1].date = "19/02/16"; 
         string dir = System.IO.Path.GetDirectoryName (System.Reflection.Assembly.GetExecutingAssembly ().Location); // For when it is installed on a computer. Not when being used in unity.
  
         string filePath = "E:/" + "highscore.csv"; 
         // replace the "E:/" with dir when done
  
         if (!File.Exists (filePath)) { // verifies file is there.
             File.Create (filePath).Close ();
         }
 
         using (StreamReader reader = new StreamReader (filePath)) {
             string line;
             int i = 1;
             while ((line = reader.ReadLine ()) != null) {
                 string[] part = line.Split (',');
                  
                 hs [i + 1].name = part [0];
                 int x = int.Parse (part [1]);
                 hs [i + 1].score = x;
                 hs [i + 1].date = part [2];
                 i = i + 1;
                 Debug.Log (hs [i].name);
                 Debug.Log (hs [i].score);
                 Debug.Log (hs [i].date);
             }
         reader.Close();    
         
             
             int c = i - 1;
 
             for (int a = 1; a < c; a++) {
                 // Starts a second loop to compare the record values of the one record against the other then swaps them.
                 for (int b = 0; b < c - 1; b++) {
                     // The if statement checks to see if the points of the driver are less than the points of the next driver in the row of the records along. 
                     if (hs [b].score < hs [b + 1].score) {
                         // The swap function then swaps all the values one record with another.
                         int temp = hs [b].score;
                         hs [b].score = hs [b + 1].score;
                         hs [b + 1].score = temp;
                     }
                 }
             }
             Debug.Log (hs[1].name);
             File.Delete (filePath);
             File.Create (filePath).Close ();

**!! I know the script works fine till this point here after the file has been created.

                 using (StreamWriter outputFile = new StreamWriter(filePath)) {
                 for (int d = 0; d < c; d++)
                 {
                 Debug.Log(d);
                 outputFile.WriteLine(hs[d].name + ", " + hs[d].score + ", " + hs[d].date);
                 }
             outputFile.Close();
             }
         }
     }
                     
      // Update is called once per frame
      void Update () {
      
      }
  }