XML File Signing and Encryption using PGP keys using Bouncy Castle's C#

I have an XML file that needs to be signed using my private PGP key and then encrypted using the client's public PGP key. My objective is to create a C# executable application that can be scheduled in the task scheduler to automatically perform these tasks. The application will continuously monitor a designated folder for XML files, and upon detection, it will proceed to sign the file with my private PGP key and encrypt it using the client's public PGP key. Finally, the encrypted files will be saved in a specified folder.