Problem form sending a document via Mail

Hello, My problem is the mail is send but no document

contenu = "Rapport Table Palette "
filepath = "C:\CSV\Export\\test.txt"
filename = "test.txt"
filedata = system.file.readFileAsBytes(filepath)
titre = "b"
A_qui = ["my.mail@compagnie.com"]
system.net.sendEmail(smtpProfile="MailTerreal",fromAddr="ivan.gnition@compagnie.com",to=A_qui,body=contenu,subject=titre,attachmentNames=filename,attachmentData=filedata)

Sorry for my bad english
Best Regard
Etienne DELAFOLIE

You need to double your first two backslashes, I think.

(Microsoft's choice of the backslash for folder separators was just plain stupid, IMNSHO, as all major programming languages use it as an escape character for control codes. Even Microsoft's own languages.)

Also, I think these need to be lists. Like so:

attachmentNames=[filename],attachmentData=[filedata]