You are developing a Windows Communication Foundation (WCF) service. The service operation takes a customer number as the only argument and returns information about the customer. The service requires a security token in the header of the message. You need to create a message contract for the service.
Which code segment should you use?（）

You are developing a page named Process.aspx in a shopping cart Web application that will be integrated into Certkiller .com's existing e-Commerce Web site. The Process.aspx page allows customers to pay for purchases using their credit cards. The Process.aspx page contains a Button control that confirms the customer's payment and calls an external Web service that charges the customer's credit card. You must implement confirmation and prevent postback unless the customer confirms payment.
What should you do?（）

A Windows Communication Foundation (WCF) service is deployed with netTcpBinding.
This service uses a duplex message exchange pattern.You are developing the next version of the WCF service.
You discover that your company's hardware load balancer performs correctly only for WCF services that use HTTP.
You need to ensure that your service works with the load balancer.
What should you do?（）

You are developing a custom service host for a Windows Communication Foundation (WCF) service. The service host is named MovieServiceHost.You need to deploy the service with the custom service host in Microsoft Internet Information Services (IIS) 7.0.
What should you do?（）

You are developing a Windows Service. The Windows Service will host a Windows Communication Foundation (WCF) service.The Windows Service class will inherit from ServiceBase.You need to ensure that the WCF service starts when the Windows Service is restarted.
What should you do in the Windows Service class?（）

You are developing a Windows Communication Foundation (WCF) service that is hosted by a Windows Forms Application.The ServiceHost instance is created in the Form Constructor.You need to ensure that the service is not blocked while the UI thread is busy.
What should you do?（）

You work as the application developer at Certkiller .com. Certkiller .com uses Visual Studio.NET 2005 as its application development platform.
You are developing a .NET Framework 2.0 Windows Service application and are busy writing the following installation code for the Windows service:
<RunInstallerAttribute(True)> Public Class TestServiceInstaller Implemets Installer
'Additional code to go here
End Class
You are required to install the Windows service and write the values associated with the service in the Windows Registry.
What should you do?（）

You are developing a Windows Communication Foundation (WCF) service.
You need to enable security auditing for all events.
What should you do?（）

You are developing a Windows Communication Foundation (WCF) service that must be discoverable.You need to ensure that the ServiceHost instance supports multiple discovery versions.
What should you do?（）

You are developing a Windows Communication Foundation (WCF) service that does not operate on a duplex channel.You find that operations do not start until all previous operations have finished. The service hosting code contains the following lines.var service = new WarehouseService(); var host = new ServiceHost(service);You need to ensure that new operations do not wait for previous operations to finish.
Which attribute should you use to decorate the service?（）