implement PGP encryption
$ dotnet add package TryIT.Pgpstring publicKeyFile = @"C:\publicKey.asc";
string inputFile = @"C:\inputFile.docx";
//string outputFile = @"C:\inputFile.docx.pgp";
await TryIT.Pgp.PgpCrypto.EncryptFileAsync(publicKeyFile, inputFile);
string privateKeyFile = @"C:\privateKey.asc";
string passPhrase = "";
string inputFile = @"C:\inputFile.docx.pgp";
//string outputFile = @"C:\inputFile.docx";
await TryIT.Pgp.PgpCrypto.DecryptFileAsync(privateKeyFile, passPhrase, inputFile);