Tool to convert DOCX and XLSX to PDF in c#

I am looking for a tool to convert DOCX and XLSX to PDF and ideally the other way around.
It is important to precisely maintain the appearance of the document - formatting, font, etc.
It is also necessary to be able to convert Word SmartArts, diagrams, etc.

@pbares,

Thanks for your query.

You can use Aspose.Words for .NET to convert DOCX to PDF and Aspose.Cells for .NET to convert XLSX to PDF. Similarly you can use Aspose.PDF for .NET to convert PDF to DOCX and PDF to XLSX renderings.

Thank you for information.
I try Aspose.Words for .NET, works, but does not preserve formatting (see picture)
This is probably due to the inserted text about evaluation copy.
It is possible to try Aspose.Words without inserting evaluation copy text ?
image.png (121.2 KB)

@pbares,

If you like to have an evaluation license to test the APIs without any restrictions or limitations for 30 days, please follow the directions provided here.