<ServiceContract()> _
Public Interface IMyService
　　<OperationContract()> _
　　Function MyOperation1(ByVal myValue1 As String) As String

　　 <OperationContract()> _
　　Function MyOperation2(ByVal dataContractValue1 As DataContract1) As String

　　 <OperationContract()> _
　　Function MyOperation3(ByVal myValue1 As String) As String

End Interface

<ServiceContract()> _
Public Interface IMyServiceV2
　　<OperationContract()> _
　　Function MyOperation_Fix(ByVal myValue1 As String, ByVal myValue2 As String) As String

End Interface

Public Class MyService
　　Implements IMyService, IMyServiceV2
　　Public Function MyOperation1(ByVal myValue1 As String) As String Implements IMyService.MyOperation1
　　　　Return "Hello: " + myValue1
　　End Function

　　Public Function MyOperation_Fix(ByVal myValue1 As String, ByVal myValue2 As String) As String Implements IMyServiceV2.MyOperation_Fix
　　　　Return "Hello: " + myValue1 +　“ , I am ” + myValue2
　　End Function

　　Public Function MyOperation2(ByVal dataContractValue1 As DataContract1) As String Implements IMyService.MyOperation2
　　　　Return "Hello: " + dataContractValue1.FirstName
　　End Function

　　Public Function MyOperation3(ByVal myValue1 As String) As String Implements IMyService.MyOperation3
　　　　Return "xxx"
　　End Function
End Class

<DataContract()> _
Public Class DataContract1
　　Private m_firstName As String
　　Private m_lastName As String

　　Public Property FirstName() As String
　　　　Get
　　　　　　Return m_firstName
　　　　End Get
　　　　Set(ByVal value As String)
　　　　　　m_firstName = value
　　　　End Set
　　End Property

　　Public Property LastName() As String
　　　　Get
　　　　　　Return m_lastName
　　　　End Get
　　　　Set(ByVal value As String)
　　　　　　m_lastName = value
　　　　End Set
　　End Property
End Class

<configuration>
　<system.serviceModel>
　　<services>
　　　<!-- Before deployment, you should remove the returnFaults behavior configuration to avoid disclosing information in exception messages -->
　　　<service name="MyService" behaviorConfiguration="returnFaults">
　　　　<endpoint contract="IMyService" binding="wsHttpBinding"/>
　　　　
　　　</service>
　　</services>
　　<behaviors>
　　　<serviceBehaviors>
　　　　<behavior name="returnFaults">
　　　　　<serviceDebug includeExceptionDetailInFaults="true" />
　　　　　<serviceMetadata httpGetEnabled="true" />
　　　　</behavior>
　　　</serviceBehaviors>
　　</behaviors>
　</system.serviceModel>

　<system.web>
　　<compilation debug="true" />
　</system.web>

</configuration>