DuplexChannelFactory(TChannel) Class (System.ServiceModel)

	    // Construct InstanceContext to handle messages on the callback interface. 
	    // An instance of ChatApp is created and passed to the InstanceContext.
			InstanceContext site = new InstanceContext(new ChatApp());

	    // Create the participant with the given endpoint configuration.
	    // Each participant opens a duplex channel to the mesh.
	    // Participant is an instance of the chat application that has opened a channel to the mesh.

			using (DuplexChannelFactory<IChatChannel> cf =
				new DuplexChannelFactory<IChatChannel>(site,"ChatEndpoint"))
			{
				X509Certificate2 issuer = GetCertificate(
					StoreName.CertificateAuthority,
					StoreLocation.CurrentUser, "CN=" + issuerName,
					X509FindType.FindBySubjectDistinguishedName);
				cf.Credentials.Peer.Certificate =
					GetCertificate(StoreName.My,
					StoreLocation.CurrentUser,
					"CN=" + member,
					X509FindType.FindBySubjectDistinguishedName);
				cf.Credentials.Peer.PeerAuthentication.CertificateValidationMode  =
					X509CertificateValidationMode.Custom;
				cf.Credentials.Peer.PeerAuthentication.CustomCertificateValidator =
					new IssuerBasedValidator();

				using (IChatChannel participant = cf.CreateChannel())
				{
		    // Retrieve the PeerNode associated with the participant and register for online/offline events.
		    // PeerNode represents a node in the mesh. Mesh is the named collection of connected nodes.
					IOnlineStatus ostat = participant.GetProperty<IOnlineStatus>();
					ostat.Online += new EventHandler(OnOnline);
					ostat.Offline += new EventHandler(OnOffline);

					Console.WriteLine("{0} is ready", member);
					Console.WriteLine("Press <ENTER> to send the chat message.");                   

		    // Announce self to other participants.
					participant.Join(member);
					Console.ReadLine();
					participant.Chat(member, "Hi there - I am chatting");

					Console.WriteLine("Press <ENTER> to terminate this instance of chat.");
					Console.ReadLine();
		    // Leave the mesh and close the client.
					participant.Leave(member);
				}
			}