ASP.NET 2.0 - X.509 Encryption

Hi there,

I am new to security certificates and encrypting through them.

I am trying to encrypt a simple string from within c# using the private

key of an X.509 certificate i have created on my machine.

I can find the relevant certificate no problem, its just i do not know
how to then use this certificates private key to encrypt (and then
decrypt with the public key) within c#.

I have looked all over the place, but i cannot find anything that helps

me.

Again, I am looking to encrypt and decrypt through private and public
keys of an X.509 certificate I have created.

Any help would be much appreciated.

Thanks,

Lenny