아까 listview 중복 제거 요청

[vb.net(118.41)]

        Dim array As New ArrayList()
        Dim val As String
        Dim count As Integer

        For i = 0 To ListView1.Items.Count - 1
            val = ListView1.Items(i).Text
            If Not (array.Contains(val)) Then
                array.Add(val)
                count = count + 1
            End If
        Next

        ListView1.Items.Clear()

        For i = 0 To count - 1
            ListView1.Items.Add(array(i))
        Next

왜 글 지웠나