====== How to Debug a WCF Service Hosted in Windows Service ======
1.Open the Service1.cs file and add two more public methods in the same class, which basically calls the OnStart() and OnStop() methods internally:
<code>      
        public void OnDebugMode_Start()
        {
            OnStart(null);
        }
        public void OnDebugMode_Stop()
        {
            OnStop();
        }
</code>

1.Open the Program.cs and modify main
<code>
        static void Main()
        {
            #if (!DEBUG)
            ServiceBase[] ServicesToRun;
            ServicesToRun = new ServiceBase[] 
			{ 
				new Service1() 
			};
            ServiceBase.Run(ServicesToRun);
            #else
            var service = new Service1();
            service.OnDebugMode_Start();
            System.Threading.Thread.Sleep(System.Threading.Timeout.Infinite);
            service.OnDebugMode_Stop();
            #endif
        }

</code>


source [[http://www.c-sharpcorner.com/UploadFile/0f68f2/how-to-debug-a-wcf-service-hosted-in-windows-service/ |How to Debug a WCF Service Hosted in Windows Service]]