vb.net - reading file

Hello there,
I have this function to convert unix text files into windows dos text format.
everything works fine but the issue is that for example I have a text with this in it

|| # Copyright ©2000-2011

after conversion it becomes

|| # Copyright ¿2000-2011

how can I prevent stuff like these from happening?

Private Sub TextUnixToWin(ByVal strFilePath As String)
        Try
            Dim outFile As New List(Of String)
            Using inFile As New IO.StreamReader(strFilePath)
                Try
                    Dim buffer As String = String.Empty
                    Try
                        While Not inFile.EndOfStream
                            buffer = inFile.ReadLine()
                            outFile.Add(buffer)
                        End While
                    Catch ex As Exception
                        Debug.Print("Error performing conversion: {0}", ex.Message)
                        Debug.Print("Press any key to exit...{0}", vbCrLf)
                    End Try
                Catch ex As Exception
                    Debug.Print("Could not open out file: {0}", ex.Message)
                    Debug.Print("Press any key to exit...{0}", vbCrLf)
                End Try
            End Using
            If outFile.Count > 0 Then
                IO.File.WriteAllLines(strFilePath, outFile)
                Debug.Print("done! > " & strFilePath)                
            End If
        Catch ex As Exception
            Debug.Print("Could not open in file: {0}", ex.Message)
            Debug.Print("Press any key to exit...{0}", vbCrLf)
        End Try
    End Sub

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