static void Main(string[] args)
        {
            string arg       = ((args != null && args.Length > decimal.Zero ? args[(int)decimal.Zero] : null) ?? string.Empty).ToLower(); // This is only reading the input for the example application, see also end of Main method.
            string randomUrl = "net.tcp://localhost:60" + new System.Random().Next(1, 100) + "/rnd" + new System.Random().Next();         // random URL to allow multiple instances parallel (for example in Unit-Tests). // Better way?

            if (arg.StartsWith("t"))
            {
                // this part could be written as a UnitTest and should be
                string result = null;
                using (ServiceHost host = new ServiceHost(typeof(MyService)))
                {
                    host.AddServiceEndpoint(typeof(IMyService), new NetTcpBinding(), randomUrl);
                    host.Open();
                    IMyService instance = ChannelFactory <IMyService> .CreateChannel(new NetTcpBinding(), new EndpointAddress(randomUrl), null);

                    result = instance.GetIdentity();
                    host.Close();
                }
                // Assert.Equals(result,"Juy Juka");
            }
            else if (arg.StartsWith("s"))
            {
                // This part runs the service and provides it to the outside. Just to show that it is a real and working host. (and not only working in a Unit-Test)
                using (ServiceHost host = new ServiceHost(typeof(MyService)))
                {
                    host.AddServiceEndpoint(typeof(IMyService), new NetTcpBinding(), randomUrl);
                    host.Open();
                    System.Console.Out.WriteLine("Service hosted under following URL. Terminate with ENTER.");
                    System.Console.Out.WriteLine(randomUrl);
                    System.Console.In.ReadLine();
                    host.Close();
                }
            }
            else if (arg.StartsWith("c"))
            {
                // This part consumes a service that is run/hosted outoside of the application. Just to show that it is a real and working host. (and not only working in a Unit-Test)
                System.Console.Out.WriteLine("Please enter URL of the Service. Execute GetIdentity with ENTER. Terminate with ENTER.");
                IMyService instance = ChannelFactory <IMyService> .CreateChannel(new NetTcpBinding(), new EndpointAddress(System.Console.In.ReadLine()), null);

                System.Console.Out.WriteLine(instance.GetIdentity());
                System.Console.In.ReadLine();
            }
            else
            {
                // This is only to explain the example application here.
                System.Console.Out.WriteLine("I don't understand? Please use one of the following (Terminate this instance with ENTER):");
                System.Console.Out.WriteLine("t: To host and call the service at once, like in a UnitTest.");
                System.Console.Out.WriteLine("s: To host the servic, waiting for clients.");
                System.Console.Out.WriteLine("c: To contact a hosted service and display it's GetIdenttity result.");
                System.Console.In.ReadLine();
            }
        }