how can I delete all that string instead of writing nothing? because nothing actually means a line with nothing, but the line exists. I want it to no longer exist!

```vb
Dim textfile() As String = IO.File.ReadAllLines(My.Application.Info.DirectoryPath + ("\textfile.txt"))

For i As Integer = 0 To textfile.Count - 1
    If textfile(i).Length > 1 Then
        textfile(i) = Nothing 'here i want to delete
    End if
Next

```