Error when trying to parse csv file

I get a strange error when I try to take the data out of a csv file. I get : error CS1525: Unexpected symbol txt', expecting )', or `.'

Here is my script

     using UnityEngine;
 using System.Collections;
 
 public class Mindthecube : MonoBehaviour {
 
     // Use this for initialization
     void Start () { FileInfo theSourceFile = null;
 TextReader reader = null;  // NOTE: TextReader, superclass of StreamReader and StringReader
  
 // Read from plain text file if it exists
 theSourceFile = new FileInfo (Application.dataPath + "/puzzles.txt");
 if ( theSourceFile != null && theSourceFile.Exists )
 {
    reader = theSourceFile.OpenText();  // returns StreamReader
 }
 else
 {
    // try to read from Resources instead
    TextAsset puzdata = (TextAsset)Resources.Load("puzzles", typeof(TextAsset));
    reader = new StringReader(puzdata.text);  // returns StringReader
 }
 if ( reader == null )
 {
    Debug.Log("puzzles.txt not found or not readable");
 }
 else
 {
    // Read each line from the file/resource
    while ( (string txt = reader.ReadLine()) != null )
    Debug.Log("-->" + txt);
 }
     
     }
     
 
     }