textfile to listbox

I am having trouble getting items from a text file to show up when my form opens immediately. I have done this before with a .csv file and thought it would be similar, but it hasn't worked. I've tried the codes used by my other classmates and I still can't get it to show up in my list box. Basically the form has a menu bar with a few options on it and then a huge list box filling the rest.

And this is the code I've tried:
Structure invdetails
Dim title As String
Dim author As String
Dim category As String
Dim price As Double
Dim quantity As Integer
End Structure
Private Sub lstBox_SelectedIndexChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles lstBox.SelectedIndexChanged
Dim inventory() As invdetails

Dim books() As String = File.ReadAllLines("Books.txt")
Array.Sort(books)
Dim n As Integer = books.Count - 1
ReDim inventory(n)
Dim line As String
Dim data() As String


For i As Integer = 0 To n
line = books(i)
data = line.Split(","c)
inventory(i).title = data(0)
inventory(i).author = data(1)
inventory(i).category = data(2)
inventory(i).price = CDbl(data(3))
inventory(i).quantity = CInt(data(4))
Next

For i As Integer = 0 To n
lstBox.Items.Add(inventory(i).title)
Next

End Sub

Also:
Dim reader As IO.StreamReader = New IO.StreamReader(New IO.FileStream("books.txt", IO.FileMode.Open))

Do While Not reader.EndOfStream
lstBox.Items.Add(reader.ReadLine())
Loop

Also:

'Gets hardcoded text file
Dim books As String = "books.txt"

'Open filestream
Dim booksfs As IO.FileStream = New IO.FileStream(books, IO.FileMode.Open)

'Open streamreader
Dim bookssr As IO.StreamReader = New IO.StreamReader(booksfs)

'Display contents of txt file in list box
For Each item As String In "books.txt"
lstBox.Items.Add(item)
Next

'Close streamreader
bookssr.Close()

'Close filestream
booksfs.Close()

These are a few I have tried and none of these have gotten the text file to open immediately in the list box when it opens. I can't get them to show up at all actually.

The text file is Title, Author, Fiction or Non Fiction, Stock Amount, and Price

Any help would be appreciated!