TweetSharp send message to followers?

Does anybody no if buy using tweetsharp that if one can send to a persons follow list a message I have made the following code that allows me to message a person via userid but any ideas.

 var service = new 
       TweetSharp.TwitterService("ConsumerKey","ConsumerSecret","TokenKey","TokenSec
       retKey"); 
      var twitterStatus = service.SendTweet(new SendTweetOptions() { Status ="Hello World" });
if (twitterStatus != null)
{
    MessageBox.Show("It worked");
}