VB.NET is not liking my code to open a text file for read access. I'm trying to populate a listbox with the contents of a text file, but .NET does not recognize the following code:

Code:
Dim strFile As String
        strFile = "\support files\chronill.dat"
Open strFile for input as #1
What is different in VB.NET from 6.0 as far as this goes?