start a simple console application class Program { static void Main(string[] args) { } } Replace the above code with following code... (You also need to add reference the syste.Servicemodel .Net Assembly ) /////////// [ServiceContract(Namespace = "http://www.janaganamana.net/Astrology")] public interface IAstrology { [OperationContract] string GetHoroscope (int year ); } class AstrologyService : IAstrology { string[] chances = new string[7] { "Good Day", "Bad day", "HopeGoodThings", "Live like a king", "Silence please", "Give Respect ", "Take resepect" }; public string GetHoroscope(int year) { int i = DateTime.Now.Millisecond %7 ; return chances[i]; } } class Program { static void Main(string[] args) { Uri baseAddress = new Uri("http://localhost:8000/wcfSamples/Astrology"); ServiceHost selfHost = new ServiceHost(typeof(AstrologyService), baseAddress); try { selfHost.AddServiceEndpoint(typeof(IAstrology),new WSHttpBinding(),"AstrologyService"); ServiceMetadataBehavior smb = new ServiceMetadataBehavior(); smb.HttpGetEnabled = true; selfHost.Description.Behaviors.Add(smb); selfHost.Open(); Console.WriteLine("The service is running."); Console.WriteLine("Press <ENTER> to terminate service."); Console.WriteLine(); Console.ReadLine(); selfHost.Close(); } catch (CommunicationException ce) { Console.WriteLine("An exception occurred: {0}", ce.Message); selfHost.Abort(); } } } /////////////

Run the program as is .... Browse the URL http://localhost:8000/wcfSamples/Astrology Out of three components 1) service 2) Host 3) Client -- (your Browser NOW) First two components are in the console application 1) Service It has two parts interface nd implementer This is the contract/interface [ServiceContract(Namespace = "http://www.janaganamana.net/Astrology")] public interface IAstrology { [OperationContract] string GetHoroscope (int year ); } This interface is implemented by a small class 2) HOST Main() The host started a hosting environment(that is waiting for user to press a key to close) So the host opened a service. 3) Instead of a browser , try an other windows application that uses the webservice exposed(while our HOST is running........

Note: you must be running Visual studio "Run as Administrator" other wise it will fail in Open() methos -- while crating the service. ...