[dev-crypto-csharp] How to set document name of CMS Message?

[Bruno Warmling]

How can i set the document name of CMS Message?

I trying to use this code, but not work well.

byte[] textBytes = System.Text.Encoding.Unicode.GetBytes("test.pdf");
DerOctetString berOctetString = new DerOctetString(textBytes);
Org.BouncyCastle.Asn1.Cms.Attribute documentName = new 
Org.BouncyCastle.Asn1.Cms.Attribute(dnOid, new BerSet(berOctetString));