070-503 Free Dumps Study Materials
Question 1: You create a Windows Communication Foundation service by using Microsoft .NET Framework 3.5.
The service contains the following code segment.
<DataContract()> _
Public Class Person
...
End Class
<DataContract()> _
Public Class Customer
Inherits Person
...
End Class
You need to create a service contract that meets the following requirements:
The service contract must have an operation contract named GetPerson that returns an object of type
Person.
The GetPerson operation must be able to return an object of type Customer.
Which code segment should you use?
A. <ServiceContract()> _
<ServiceKnownType("GetPerson")> _
Public Interface IMyService
<OperationContract()> _
Function GetPerson() As Person
End Interface
B. <ServiceContract()> _
Public Interface IMyService
<OperationContract()> _
<ServiceKnownType("Customer")> _
Function GetPerson() As Person
End Interface
C. <ServiceContract()> _
<ServiceKnownType(GetType(Customer))> _
Public Interface IMyService
<OperationContract()> _
Function GetPerson() As Person
End Interface
D. <ServiceContract()> _
<ServiceKnownType("GetPerson", GetType(Customer))> _
Public Interface IMyService
<OperationContract()> _
Function GetPerson() As Person
End Interface
Correct Answer: C