How to PDF a DGN in color?

I have the rasterizations to use the draw color, but the PDF is all monochrome.
VB.net

@AroundLilac,
please, attach your code and file too, so we can look at it.

Here you go. This will result in a monochrome PDF.

Try

        ' Load an existing DGN file as CadImage.
        Using cadImage As Aspose.CAD.FileFormats.Dgn.DgnImage = CType(Aspose.CAD.FileFormats.Dgn.DgnImage.Load(sourceFilePath), Aspose.CAD.FileFormats.Dgn.DgnImage)
            ' Create an object of CadRasterizationOptions class and define/set different properties
            Dim rasterizationOptions As New Aspose.CAD.ImageOptions.CadRasterizationOptions()
            rasterizationOptions.PageWidth = 600
            rasterizationOptions.PageHeight = 300
            rasterizationOptions.NoScaling = True
            rasterizationOptions.AutomaticLayoutsScaling = False
            rasterizationOptions.DrawType = Aspose.CAD.FileFormats.Cad.CadDrawTypeMode.UseDrawColor

            ' Create an object of PdfOptions class as we are converting the image to PDF format and assign CadRasterizationOptions object to it.
            Dim pdfOptions As New Aspose.CAD.ImageOptions.PdfOptions()
            pdfOptions.VectorRasterizationOptions = rasterizationOptions

            ' Call the save method of the CadImage class object.
            cadImage.Save(DestFilePath, pdfOptions)
        End Using
        'ExEnd:ExportDGNToPdf            
        Console.WriteLine(vbLf & "The DGN file exported successfully to PDF." & vbLf & "File saved at " & DestFilePath)

    Catch ex As Exception
        Console.WriteLine("Please use valid input file." & ex.Message)
    End Try

@AroundLilac,
probably, the initial file is monochrome too? We can not analyze and debug why color is missing without the initial file. Please, attach it.