IContentHandler.StartMultipart Method 

Called when the body of a multipart entity is about to be parsed.

void StartMultipart(
   BodyDescriptor bd
);

Parameters

bd
encapsulates the values (either read from the message stream or, if not present, determined implictly as described in the MIME rfc:s) of the Content-Type and Content-Transfer-Encoding header fields.

See Also

IContentHandler Interface | NI.Email.Mime Namespace