BadImageFormatException: Include Script using AssetBundle

Hi, I wanted to create a feature where we could import scripts I found this Unity Documentation that let us include scripts on an AssetBundle https://docs.unity3d.com/Manual/scriptsinassetbundles.html

-I've edited this much so that it will search my files not web.

-The DebugTest.txt is a c# script that I wanted to import in. its just a Debug.Log() script on an Update to see if its working.

-Had to change bundle.Load into bundle.LoadAsset because Unity says it deprecated.

-At first I got an error called NullReferenceException which means there is nothing inside this line of codes:

 TextAsset txt = bundle.LoadAsset("debugTest", typeof(TextAsset)) as TextAsset;

that's why I had to put an if statement to see if txt is not empty. which is now isn't so Debug.Log ("txt has something inside"); is working. and so along with the log message. I got the error BadImageFormatException. which probably means. I'm in the right track? probably? cause it didn't have any compiler error, but starting the game does.

-BadImageFormatException doesn't give me a line of code error meaning when I click the console to see the line code error.. nothing happens. so what I did is put Debug.Log at each and every line of codes after loading the textasset object. It worked and in the console it wen't up to 1 and then the BadImageFormatException error which means the problem is assembly loading? maybe its deprecated?

this my simple script copied from the Unity Documentation.

 using UnityEngine;
  using System.Collections;
  using UnityEngine.UI;
  
  public class ScriptImporter : MonoBehaviour {
      string url ="file:///C:\\Users\\rhylvin2016\\Documents\\ScriptImporter Trial\\Assets\\AssetScripts\\script";
      IEnumerator Start ()
      {
          while (!Caching.ready)
              yield return null;
  
          // Start a download of the given URL
          WWW www = WWW.LoadFromCacheOrDownload (url, 1);
  
          // Wait for download to complete
          yield return www;
  
          // Load and retrieve the AssetBundle
          AssetBundle bundle = www.assetBundle;
  
          // Load the TextAsset object
          TextAsset txt = bundle.LoadAsset("debugTest", typeof(TextAsset)) as TextAsset;
          if (txt != null)
     {
         Debug.Log ("txt has something inside");
     }
                      Debug.Log ("1");
          // Load the assembly and get a type (class) from it             
          var assembly = System.Reflection.Assembly.Load(txt.bytes);
                      Debug.Log ("2");
          var type = assembly.GetType("DebugTrial");
                      Debug.Log ("3");
          // Instantiate a GameObject and add a component with the loaded class
          GameObject go = new GameObject();
          go.AddComponent(type);
      }
  
  
  }