You are creating a Windows Communication Foundation (WCF) service. You do not want to expose the internal implementation at the service layer.
You need to expose the following class as a service named Arithmetic with an operation named Sum:

public class Calculator
{
public int Add(int x, int y)
{
}
}

Which code segment should you use?

You are creating a Windows Communication Foundation (WCF) service that is implemented as follows.
(Line numbers are included for reference only.)

01 [ServiceContract]
02 [ServiceBehavior(IncludeExceptionDetailsInFaults = true)]
03 public class OrderService
04 {
05 [OperationContract]
06 public void SubmitOrder(Order anOrder)
07 {
08 try
09 {
10 …
11 }
12 catch(DivideByZeroException ex)
13 {
14 …
15 }
16 }
17 }

You need to ensure that the stack trace details of the exception are not included in the error information sent to the client.
What should you do?