Populating Dictionary at run-time from .txt file on imported asset bundle

I have created a software that will create a dictionary in C# structure for unity.....or any other format .

I came across a problem right away when trying to implement a similar method od creating a dictionary in unity.

 if(GameObject.Find("ImportedBundle"))// This is the bundle that was imported and instantiated 
         {
             string thetext;
             thetext = GameObject.Find("ImportedBundle").GetComponent<txtFile>().text;
                 foreach(string line in thetext )
             {
 
             }
         }

seeing as 'txtFile' or 'ImportedBundle' wont exist until the bungle is imported i end up getting an error which seems almost inevitable.

i wrote a code in .net which takes in lines of string like this

'hello this is my shoes_up_car_van_truck' 'hello who are you_aHand_pen_comb_fork'

and using this.net code

  For Each line As String In Text1.Lines
 
             For Each st As String In line.Split("_")
                 TextBox1.Text = ReplaceFirst(TextBox1.Text, "_", st)
 
             Next st
             Text2.Text += TextBox1.Text + _
         Environment.NewLine
             
 
         Next

I will get this result

    dictionary.Add("hello this is my shoes", new string[] {"up", "car","van(A)","truck"});
 
     dictionary.Add("hello who are you", new string[] {"aHand", "pen","comb","fork"});

i will get this result which works fine for C# .

but now I need to populate the dictionary directly from a .txt file at runtime from a instantiated asset bundle which has a .txt file attached to it

needless to say I NEED help . how can i get this to work ?