1.The first solution, related wit the debugging of any Widnows Service aaplication, is to attach your project from Visual Studio to the to the installed process. You can see details here:
http://msdn.microsoft.com/en-us/library/7a50syb3(v=vs.110).aspx[
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2. Because in fact you want to test your WCF service and not the Windows service itself, you should create a new project of type
WCF Service Library then you have to move into it all WCF Service part existing now in your Windows service project, including the settings from app.config.
In your existing Windows Service you have to keep all WCF settings from app.config (so you will have them in 2 places), and the hosting part of the WCF service itself (the usage of
ServiceHost class).
Then you will can test your WCF service directly from Visual Studio, when you start your user interface application in Debug mode, automatically the VS will start and host your WCF service into the "WCF Test Client". You should read the next
details about WCF Test Client[
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