How to solve “The ChannelDispatcher is unable to open its IChannelListener” error?

Question

I\'m trying to communicate between WCF hosted in Windows Service and my service GUI. The problem is when I\'m trying to execute OperationContract method I\'m getting

Answer 1

I encountered this exception for the same reason as the OP but I couldn't move my service's implementation into a new class. So, I found another solution. ServiceHost has a second overload that takes an instance of a service. Thus, here are the changes applied to the OP's 'BAD' code:

namespace WCFServer
{
    [ServiceBehavior(InstanceContextMode=InstanceContextMode.Single)] // required
    public class Program : IWCFService
    {
        private ServiceHost host;

        static void Main(string[] args)
        {
            new Program();
        }

        public Program()
        {
            host = new ServiceHost(this); // changed
            host.Open();

            Console.WriteLine("Server Started!");
            Console.ReadKey();
        }

        #region IWCFService Members

        public int CheckHealth(int id)
        {
            return (1);
        }

        #endregion
    }
}