NetTcpRelayBinding Class

public class NetTcpRelayBinding : NetTcpRelayBindingBase, 
	IBindingRuntimePreferences

<system.serviceModel>

  <bindings>
    <!-- Application Binding -->
    <netTcpRelayBinding>
      <binding name="default" />
    </netTcpRelayBinding>
  </bindings>

  <client>
    <endpoint name="RelayEndpoint"
              contract="Microsoft.ServiceBus.Samples.IMyContract"
              binding="netTcpRelayBinding"
              bindingConfiguration="default"
              behaviorConfiguration="ReplaceWithEndpointBehaviorName"
              address="ReplaceWithEndpointAddress" />
  </client>
  
  <services>
    <service name="Microsoft.ServiceBus.Samples.MyService">
      <!-- Keep address empty to use host base address, or -->
      <!-- replace with endpoint address. -->
      <endpoint name="RelayEndpoint"
                contract="Microsoft.ServiceBus.Samples.IMyContract"
                binding="netTcpRelayBinding"
                bindingConfiguration="default"                
                behaviorConfiguration="ReplaceWithEndpointBehaviorName"
                address="" />
    </service>
  </services>

  <behaviors>
    <endpointBehaviors>
      <!-- Add endpoint behavior here. -->
    </endpointBehaviors>
  </behaviors>

</system.serviceModel>

<system.serviceModel>

  <bindings>
    <!-- Application Binding -->
    <netTcpRelayBinding>
      <binding name="customBinding">
        <!-- Turn off client authentication -->
        <security relayClientAuthenticationType="None" />
    </netTcpRelayBinding>
  </bindings>

  <client>
    <!-- No behavior configuration is added to this endpoint as the client does not need to authenticate. -->
    <endpoint name="RelayEndpoint"
              contract="Microsoft.ServiceBus.Samples.IMyContract"
              binding="netTcpRelayBinding"
              bindingConfiguration="customBinding"
              address="ReplaceWithEndpointAddress" />
  </client>
  
  <services>
    <service name="Microsoft.ServiceBus.Samples.MyService">
      <!-- Keep address empty to use host base address, or -->
      <!-- replace with endpoint address. -->
      <endpoint name="RelayEndpoint"
                contract="Microsoft.ServiceBus.Samples.IMyContract"
                binding="netTcpRelayBinding"
                bindingConfiguration="customBinding"
                behaviorConfiguration="ReplaceWithEndpointBehaviorName"
                address="" />
    </service>
  </services>

  <behaviors>
    <endpointBehaviors>
      <!-- Add endpoint behavior here. -->
    </endpointBehaviors>
  </behaviors>

</system.serviceModel>

// Configure the credentials for the service and client endpoints through an endpoint behavior.
TransportClientEndpointBehavior relayCredentials = new TransportClientEndpointBehavior();
relayCredentials.CredentialType = TransportClientCredentialType.SharedSecret;
relayCredentials.Credentials.SharedSecret.IssuerName = issuerName;
relayCredentials.Credentials.SharedSecret.IssuerSecret = issuerSecret;

// Create the binding with default settings.
NetTcpRelayBinding binding = new NetTcpRelayBinding();        

// Get the service URI.
Uri serviceAddress = ServiceBusEnvironment.CreateServiceUri("sb", serviceNamespace,
       String.Format(CultureInfo.InvariantCulture, "{0}/MyService/", session));

// Create the service host.
ServiceHost host = new ServiceHost(typeof(MyService), serviceAddress);
// Add the service endpoint with the NetTcpRelayBinding binding.
host.AddServiceEndpoint(typeof(IMyContract), binding, serviceAddress);
// Add the credentials through the endpoint behavior.
host.Description.Endpoints[0].Behaviors.Add(relayCredentials);
// Start the service.
host.Open();

// Create a channel factory for the specified channel type.
// This channel factory is used to create client channels to the service. 
// Each client channel the channel factory creates is configured to use the 
// NetTcpRelayBinding that is passed to the constructor of the channel factory.
ChannelFactory<IMyChannel> channelFactory = new ChannelFactory<IMyChannel>(
    binding, new EndpointAddress(serviceAddress));
channelFactory.Endpoint.Behaviors.Add(relayCredentials);

// Create and open the client channel.
IMyChannel channel = channelFactory.CreateChannel();
channel.Open();

// Configure the credentials for the service and client endpoints through an endpoint behavior.
TransportClientEndpointBehavior relayCredentials = new TransportClientEndpointBehavior();
relayCredentials.CredentialType = TransportClientCredentialType.SharedSecret;
relayCredentials.Credentials.SharedSecret.IssuerName = issuerName;
relayCredentials.Credentials.SharedSecret.IssuerSecret = issuerSecret;

// Create the binding with custom settings.
NetTcpRelayBinding binding = new NetTcpRelayBinding();        
// The client is not required to present a security token to the AppFabric Service Bus.
binding.Security.RelayClientAuthenticationType = RelayClientAuthenticationType.None;

// Get the service URI.
Uri serviceAddress = ServiceBusEnvironment.CreateServiceUri("sb", serviceNamespace,
       String.Format(CultureInfo.InvariantCulture, "{0}/MyService/", session));

// Create the service host.
ServiceHost host = new ServiceHost(typeof(MyService), serviceAddress);
// Add the service endpoint with the NetTcpRelayBinding binding.
host.AddServiceEndpoint(typeof(IMyContract), binding, serviceAddress);
// Add the credentials through the endpoint behavior.
host.Description.Endpoints[0].Behaviors.Add(relayCredentials);
// Start the service.
host.Open();

// Create a channel factory for the specified channel type.
// This channel factory is used to create client channels to the service. 
// Each client channel the channel factory creates is configured to use the 
// NetTcpRelayBinding that is passed to the constructor of the channel factory.
ChannelFactory<IMyChannel> channelFactory = new ChannelFactory<IMyChannel>(
    binding, new EndpointAddress(serviceAddress));

// Create and open the client channel.
IMyChannel channel = channelFactory.CreateChannel();
channel.Open();