Why this error ?

[Olivier Couvez]

Ty for your reply

[Kees]

En jij verwacht dat ik die taal kan lezen? = You expect me to understand that language?

[Kees]

You are probably using the wrong converter object. Use the complete namespace or add a using to your cs file.

Try this

using (var converter = new ChromHtmlToPdf.Converter())