I'm trying to send an RSA public key to an OpenSSL-based application. I'm
hoping I'm missing something obvious, but I can't seem to find a good example
of getting the RSA public key into a format recognizable by OpenSSL.

Does anyone have an example of PEM-encoding an RSACryptoProvider's public key?

At the very least, can someone point me to getting the DER-encoding? It
seems that PEM may just be DER in Base64 with a simple ASCII wrapper...