Exporting Selected Items From ListBox To Textbox

What I have is a listbox and a text box. I want to be able to select the items in the listbox (selection mode is set to multiextended). The problem is

Dim path As String = ListBox2.SelectedItem & " " & ListBox1.SelectedItem & ".txt"
'the line above creates a path with the title of an item from listbox2 + listbox1 and adds the .txt extension.
For Each item In ListBox3.SelectedItems
TextBox1.Text = item
Next
'this just makes it do nothing.

I have also tried diffrent methods to export an item title to a text file. for example I tried:
Dim path As String = ListBox2.SelectedItem & " " & ListBox1.SelectedItem & ".txt"
For Each item In ListBox3.SelectedItems
File.CreateText(path)
Next
'this just gives me a IO exception
It does create a file but it does not contain anything.