Pretty Good Privacy using C#.net

Conceptual View Step 1 : passphrase[Signature] ------- > Key Generator Step 2 : Key Generator ----------Gives ------- Public key and Private Key Step 3: Original Text[Plain Text] + Public Key + Private Key + Signature = PGP Encryption Step 4: PGP Encrypted Text + Private Key + passphrase[Signature] = Original Text[Plain Text]