Reading from file (C#) + Information from scene to scene (C#)

I'm creating a C# script to load some information about a level, but I'm having some problems with it. 1) The script doesn't want to open the info.txt file; 2) I don't know how to transport a variable from a scene to another; 3) I don't know how to edit the content of the elements inside a Canvas. This i the code that I've created

 using System.Collections;
 using System.Collections.Generic;
 using System.IO;
 using System.Text;
 using UnityEngine;
 using UnityEngine.UI;
 public class LoadInformations : MonoBehaviour {
     public Canvas canvas;
     private string filePath = "/Files/info.txt";
 
     void Start () {
         bool i = true;
         string levelC = PlayerPrefs.GetString("levelC");
         try
         {
             string line;
             StreamReader sr = new StreamReader(filePath, Encoding.Default);
             using (sr)
             {
                 line = sr.ReadLine();
                 do
                 {
                     if (line != null)
                     {
                         string[] words = line.Split(',');
                         if (words.Length > 0) {
                             if (words[0]==levelC)
                             {
                                 Canvas.FindObjectOfType<Button>().gameObject.GetComponent<Text>().text = words[0]+" - "+words[1];
                                 Canvas.FindObjectOfType<Text>().text = words[2];
                                 Canvas.FindObjectOfType<Text>().text = words[3];
                                 Canvas.FindObjectOfType<Text>().text = words[4];
                                 Canvas.FindObjectOfType<Text>().text = words[5];
                                 i = false;
                             }
                         }
                     }
                     line = sr.ReadLine();
                 }
                 while (line == null && i); 
                 sr.Close();
             }
         }
         catch (IOException e)
         {
 
         }
     }
 }