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// Just for display purposes on the host.

public MagicEightBallService()

{

Console.WriteLine("The 8-Ball awaits your question...");

}

public string ObtainAnswerToQuestion(string userQuestion)

{

string[] answers =  { "Future Uncertain", "Yes", "No", 

"Hazy", "Ask again later", "Definitely" };

// Return a random response.

Random r = new Random();

return string.Format("{0}? {1}.", 

userQuestion, answers[r.Next(answers.Length)]);

}

}

At this point, our WCF service library is complete. However, before we construct a host for this

service, let’s examine some additional details of the [ServiceContract] and [OperationContract]

attributes.