title: Creating WCF service without .svc file
body: <p>I am having issues running few files which contains a wcf service. The service is created without a config file and without a .svc file. Is it possible to run a service without a .svc file. These are 2 simple C# class files which have their full service requirements, like service contracts and operation contracts.</p>
  
  <p>I have tried it calling from another class, but it gives this error:"a project with an output type of class library cannot be started directly"</p>
  
  <p>my question is: is it necessary to have a service.svc file?</p>