Is WSDualHttpBinding in the Silverlight 4 Assembly? - silverlight-4.0

Question

I'm trying to connect to an existing Windows Service that exposes several WCF endpoints. The one I'm concerned with is the one the Silverlight 4 application will talk to. Here is the Service's config file (at least the sections we're concerned with):
<system.serviceModel>
<behaviors>
<serviceBehaviors>
<behavior name="EnableMetadataBehavior">
<serviceMetadata httpGetEnabled="true"/>
</behavior>
</serviceBehaviors>
</behaviors>
<services>
<service behaviorConfiguration="EnableMetadataBehavior" name="Cad.Server.ConsoleCustomerServicePortal">
<endpoint address="ConsoleCustomerServicePortal" binding="wsDualHttpBinding"
name="CustomerServiceEndpoint" contract="Cad.Net.Wcf.Contracts.CustomerService.ICustomerService" />
<endpoint address="" behaviorConfiguration="webHttpBehavior"
binding="webHttpBinding" name="CustomerServiceSilverlightEndpoint"
contract="Cad.Net.Wcf.Contracts.Silverlight.IClientAccessPolicy" />
<host>
<baseAddresses>
<add baseAddress="http://localhost:31313/" />
</baseAddresses>
</host>
</service>
</services>
</system.serviceModel>
The service is self hosted, and the following starts the service host:
Public Sub StartServiceHost()
'Publish the Wcf Service endpoint.
Try
shRccUserInterface = New ServiceHost(Me._CsService)
AddHandler shRccUserInterface.Faulted, AddressOf OnChannelFaulted
AddHandler shRccUserInterface.Closed, AddressOf OnChannelClosed
AddHandler shRccUserInterface.Opened, AddressOf OnChannelOpened
AddHandler shRccUserInterface.Opening, AddressOf OnChannelOpening
AddHandler shRccUserInterface.UnknownMessageReceived, AddressOf OnUnknownMessageReceived
shRccUserInterface.Open()
Me.blnServiceHostOpen = True
RaiseEvent ServiceHostOpenEvent(Me)
Catch exWcf As Exception
log.Write_Error("CsGuiComm", "StartServiceHost()", exWcf)
RaiseEvent SendUtaEmailEvent("Wcf Problem", exWcf.ToString, System.Net.Mail.MailPriority.High)
End Try
End Sub
I can generate the service reference in the Silverlight application just fine, though because of the way the service is set up, my ServiceReferences.ClientConfig file looks like this:
<configuration />
I searched and found the way around this is to provide binding and endpoint information to the proxy (http://tomasz.janczuk.org/2009/07/pubsub-sample-using-http-polling-duplex.html). Based on that example, I tried writing:
Dim _address As New EndpointAddress("http://localhost:31313/ConsoleCustomerServicePortal")
Dim _binding As New WSDualHttpBinding()
Dim _Client As New CustomerService.CsServiceReference.CustomerServiceClient(_binding, _address)
Dim _RequestType As CustomerService.CsServiceReference.VehicleSearchType = CsServiceReference.VehicleSearchType.Badge
Dim strSearchValue As String = String.Empty
...
AddHandler _Client.GetVehicleCompleted, AddressOf OnFindVehicleCompleted
_Client.GetVehicleAsync(CurrentUserName(), strSearchValue, _RequestType)
However, WSDualHttpBinding is not in the Silverlight 4 Assembly. Am I missing something? How can I either get the ServiceReferences.ClientConfig to be populated when I generate a service reference, get a reference to WSDualHttpBinding in the Silverlight app, or should I switch to a different binding (PollingDuplexHttpBinding)?

Answer 1

This Binding is not in the Silverlight Framework. Only the most basic bindings are.

Answer 2

WSDualHttpBinding Class:
A secure and interoperable binding that is designed for use with duplex service contracts that allows both services and clients to send and receive messages.
Namespace: System.ServiceModel
Assembly: System.ServiceModel (in System.ServiceModel.dll)
Is this what you're looking for?
If you add a reference to System.ServiceModel it should then work.