Повторное открытие файлового диалога в WPF

  Private Sub Button_Click_1(sender As Object, e As RoutedEventArgs) Handles ChooseFilesButton.Click
        Dim OFD As New Microsoft.Win32.OpenFileDialog With {.Title = "Choose Files", .Filter = "All files (*.*)|*.*"}
        If OFD.ShowDialog.Value = True Then
            ListBox1.Items.Add(OFD.FileName)
        End If
    End Sub

Dim OFD As New OpenFileDialog With {.Title = "Choose Files", .Filter = "All files (*.*)|*.*"}
        OFD.ShowDialog()
        If OFD.FileName <> "" Then
            ListBox1.Items.Add(OFD.FileName)
        End If

        Dim OFD As New OpenFileDialog With {.Title = "Choose Files", .Filter = "All files (*.*)|*.*"}
        If OFD.ShowDialog = DialogResult.OK Then
            ListBox1.Items.Add(OFD.FileName)
        End If

Private Sub Button_Click_1(sender As Object, e As RoutedEventArgs)
        Dim OFD As New OpenFileDialog With {.Title = "Choose Files", .Filter = "All files (*.*)|*.*"}
        OFD.ShowDialog()
        If OFD.FileName <> "" Then
            ListBox1.Items.Add(OFD.FileName)
        End If
    End Sub