C# Answering machine

Question

I was thinking of making answering machine software. I want the program to answer the phone (thru modem) after x number of rings, play a message (wav) accept a number (which mailbox) play another message (wav) and allow the caller to leave a message. I want the message to be saved on the pc as a wav or other audio file and i'll eventually want the wav sent to an email address. does anyone know which c# class or classes I would need to use for this for some direction? TIA Duddits