How to connect to XML-RPC from c#

Question

How to connect to XML-RPC Api from c# ,

A client can interact with a Pandorabot by POST'ing to:

http://www.pandorabots.com/pandora/talk-xml The form variables the client needs to POST are:

botid - see H.1 above. input - what you want said to the bot. custid - an ID to track the conversation with a particular customer. This variable is optional. If you don't send a value Pandorabots will return a custid attribute value in the element of the returned XML. Use this in subsequent POST's to continue a conversation.

How to call?