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4. You have created a Windows Communication Foundation service by using Microsoft .NET Framework
3.5.
The existing service interface is named IMyService, and contains the following code segment.
<ServiceContract(Name:="SvcOrder", _
Namespace:="http: //contoso.com/services")> _
Public Interface IMyService
<OperationContract()> _
Sub DoSomething()
End Interface
You create a new service named IMyServiceV1 that contains an operation named DoSomethingElse.
You need to ensure that existing client applications are still able to access the IMyService.DoSomething method without modifying client code.
Which code segment should you use?
A. <ServiceContract(Namespace:="http: //contoso.com/services/V1")> _
Public Interface IMyServiceV1
Inherits IMyService
<OperationContract()> _
Sub DoSomethingElse()
End Interface
B. <ServiceContract(Name:="SvcOrder")> _
Public Interface IMyServiceV1
Inherits IMyService
<OperationContract()> _
Sub DoSomethingElse()
End Interface
C. <ServiceContract(Name:="SvcOrderV1", _
Namespace:="http: //contoso.com/services")> _
Public Interface IMyServiceV1
Inherits IMyService
<OperationContract()> _
Sub DoSomethingElse() End Interface
D. <ServiceContract(Name:="SvcOrder", _
Namespace:="http: //contoso.com/services")> _
Public Interface IMyServiceV1
Inherits IMyService
<OperationContract()> _
Sub DoSomethingElse()
End Interface
Answer: D
