// Create a new service and set the current authenticated user
TwitterService service = new TwitterService();
service.AuthenticateAs(username, password);

// Get the authenticated user's profile
TwitterUser profile = service.GetUserProfile();

// Determine if a TwitterUser is following another
var isFollowing = profile.IsFollowing("dimebrain");

// Tweet as the authenticated user
var tweet = service.Tweet("This is the simple API for TweetSharp");