How to read text file to array for my generateLetter script?

Hello,

I´m writing a game level, where you must collect letters from a word and putting it in the correct order. The thing is, that I have 3 word in an arraylist. What I wanted to have is, that the words should be loaded from a txt-files into my level instead from an array.

So my question is: How to do it?

Here is my generateLetter Script with Array, which was written in JavaScript:

 #pragma strict
 //für den Namensraum System.IO
 import System.IO;
 
 //für das Prefab
 static var letter : TextMesh;
 //für die Positionen
 var minX : int;
 var maxX : int;
 var minZ : int;
 var maxZ : int;
 
 //für die bereits gesammelten Buchstaben
 private var collectedLetters : String;
 
 //für die Wörter
 var words : String[] = ["Baum", "Blatt", "Ast"];
 private var word : String;
 
 function Start () {
     //ist ein TextMesh übergeben worden?
     if (letter == null) {
         Debug.Log("Sie müssen ein TextMesh angeben.");
         return;
     }
     //ein zufälliges Wort ermitteln
     //word ist eine private Member-Variable
     word = words[Random.Range(0, words.Length)];
     //die Buchstaben im vorgegebenen Bereich verteilen
     for (var i : int = 0; i < word.Length; i++) {
         var position: Vector3 = Vector3(Random.Range(minX, maxX), 1, Random.Range(minZ, maxZ));    
         var letterBox : TextMesh = Instantiate(letter,position, transform.rotation);
         letterBox.text = word[i].ToString();
     }
 }
 
 function Update () {
 
 }
 
 function CollectLetters (letter : String) {
     //die Buchstaben anhängen
     collectedLetters = collectedLetters + letter;
 }
 
 function OnDestroy() {
     //den Dateinamen erstellen
     var filename : String;
     filename = Path.Combine(Application.persistentDataPath, "letters.txt");
 
     //eine neue Instanz von StreamWriter erzeugen
     var myFile : StreamWriter = new StreamWriter(filename);
     //die Zeichenkette speichern
     myFile.WriteLine(collectedLetters);
     //und das Suchwort
     myFile.WriteLine(word);
     //Datei schließen
     myFile.Close();
 }