This operation is not supported in WCF Client plz help

Question

Hi 
I am new to WCF and would like to create duplex (TCP binding) WCF service as well as WCF client.
see the below code. When I run the application in WCF client it on every operationcontract "This operation is not supported in WCF Client"
  [ServiceContract(CallbackContract=typeof(ICalculatorDuplexCallback))]
    public interface ICalculatorDuplex
        [OperationContract(IsOneWay = true)]
        void Clear();
        [OperationContract(IsOneWay = true)]
        void AddTo(double n);
        [OperationContract(IsOneWay = true)]
        void SubtractFrom(double n);
        [OperationContract(IsOneWay = true)]
        void MultiplyBy(double n);
        [OperationContract(IsOneWay = true)]
        void DivideBy(double n);
    public interface ICalculatorDuplexCallback
        [OperationContract(IsOneWay = true)]
        void Equals(double result);
        [OperationContract(IsOneWay = true)]
        void Equation(string eqn);
namespace DuplexWCFService
    [ServiceBehavior(InstanceContextMode = InstanceContextMode.PerCall)]
    public class CalculatorService : ICalculatorDuplex
        double result;
        string equation;
        ICalculatorDuplexCallback callback = null;
        public CalculatorService()
            result = 0.0D;
            equation = result.ToString();
            callback = OperationContext.Current.GetCallbackChannel<ICalculatorDuplexCallback>();
        public void Clear()
            callback.Equation(equation + " = " + result.ToString());
            result = 0.0D;
            equation = result.ToString();
        public void AddTo(double n)
            result += n;
            equation += " + " + n.ToString();
            callback.Equals(result);
        public void SubtractFrom(double n)
            result -= n;
            equation += " - " + n.ToString();
            callback.Equals(result);
        public void MultiplyBy(double n)
            result *= n;
            equation += " * " + n.ToString();
            callback.Equals(result);
        public void DivideBy(double n)
            result /= n;
            equation += " / " + n.ToString();
            callback.Equals(result);
<system.serviceModel>
    <bindings>
      <netTcpBinding>
        <binding name="tcp_secure">
        </binding>
      </netTcpBinding>
    </bindings>
    <services>
      <service name="DuplexWCFService.CalculatorService">
        <endpoint address="" binding="netTcpBinding" bindingConfiguration="tcp_secure"
          contract="DuplexWCFService.ICalculatorDuplex">
          <identity>
            <dns value="localhost" />
          </identity>
        </endpoint>
        <endpoint address="mex" binding="mexTcpBinding" bindingConfiguration=""
          contract="IMetadataExchange" />
        <host>
          <baseAddresses>
            <add baseAddress="net.tcp://IRFAN-TSDD:8733/DuplexWCFService" />
          </baseAddresses>
        </host>
      </service>
    </services>
    <behaviors>
      <serviceBehaviors>
        <behavior name="">
          <serviceMetadata httpGetEnabled="false" />
          <serviceDebug includeExceptionDetailInFaults="false" />
        </behavior>
      </serviceBehaviors>
    </behaviors>
  </system.serviceModel>

Answer 1

Hi,
The following is a list of features not supported by WCF Test Client:
Types:
Stream,
Message,
XmlElement,
XmlAttribute,
XmlNode, types that implement the
IXmlSerializable interface, including the related
XmlSchemaProviderAttribute attribute, and the
XDocument and
XElement types and the ADO.NET
DataTable type.
Duplex contract.
Transaction.
Security: CardSpace , Certificate, and Username/Password.
Bindings: WSFederationbinding, any Context bindings and Https binding, WebHttpbinding (Json response message support).
For more information, you could refer to:
https://msdn.microsoft.com/en-us/library/bb552364%28v=vs.110%29.aspx?f=255&MSPPError=-2147217396#sectionToggle19
https://social.msdn.microsoft.com/Forums/vstudio/en-US/5787cd27-d8ae-47a3-8281-aa86e56dea0b/how-to-test-duplex-service-using-wcftestclientexe-tool?forum=wcf
For
testing WCF duplex service:
http://stackoverflow.com/questions/8154102/how-do-i-test-my-wcf-duplex-service
Regards