[Mr. Carter]

Well decided to drop this, since this is a much faster way loading lists into list of strings rather than loading into listbox.

So, after public class form add

Code

Dim list As New List(Of String)

To load items into list,

Code

Using FD As New OpenFileDialog()
FD.Title = "Load a text file"
FD.Filter = "Text Files (*.TXT;)|*.TXT|All files (*.*)|*.*" If FD.ShowDialog = Windows.Forms.DialogResult.OK Then
list.AddRange(IO.File.ReadAllLines(FD.FileName))
End If
End Using

To clear just simply do

Code

list.clear

The other functions work like that too like (add, addrange, etc..).

Well not sure if I'm not missing anything tho, that's mostly for just loading and clearing the list.

[Mr. Carter]

You also might want to multithread the loop for greater speed.
You should get the best results with a multi-threaded streamreader.

it can go even faster lmao ? :D Well this is fast enough for me really, thanks to those C# open source crackers out there.