Hello, I wanted to tell you that i added support for RFC 6637 into the c# version (among other thinks, like code cleanup and refactorings). You can find the repository here: https://github.com/esskar/BouncyCastle.Crypto
The implementation for the encryption is not yet as pretty as i want it to be, but we needed this feature for product and as the deadline approaches, i am glad i finished functionality in time, but i can assure you that i will keep working on the implementation. I tested against the PGP CommanLine version from Symmantec. I hope this helps anyone. Cheers, esskar