VB.NET Filtering ListItems Problem

Question

I am trying to filter a ListBox based on the presence of a string. Basically, if there is a ListItem that doesn\'t contain the string then I want to remove all ListItems that do

Answer 1

Based on balpha's help above, this is what I ultimately did:

Dim StringPresent As Boolean = False
Dim Item As ListItem

For Each Item In CtheList.Items
    If Item.Text.IndexOf("W:") = -1 Then
        StringPresent = True
        Exit For
    End If
Next

If StringPresent = True Then
    Dim i As Integer
    For i = CtheList.Items.Count - 1 To 0 Step -1
        If CtheList.Items.Item(i).Text.IndexOf("W:") > -1 Then
            CtheList.Items.RemoveAt(i)
        End If
    Next i
End If