iservice2

using System;
using System.Collections.Generic;
using System.Linq;
using System.Runtime.Serialization;
using System.ServiceModel;
using System.Text;

namespace WcfServiceLibrary2
{
    // NOTE: You can use the "Rename" command on the "Refactor" menu to change the interface name "IService1" in both code and config file together.
    [ServiceContract (SessionMode =  SessionMode.Required, CallbackContract = typeof(ICallbackHandler))]
    public interface ICallbackKalkulator
    {

        // TODO: Add your service operations here
        [OperationContract(IsOneWay = true)]
        void Factorial(double n);

        [OperationContract(IsOneWay = true)]
        void CalcSomething(int sek);
    }

    public interface ICallbackHandler
    {
        [OperationContract(IsOneWay = true)]
        void FactorialCB(double result);

        [OperationContract(IsOneWay = true)]
        void CalcSomethingCB(string result);
    }
}