This file contains the details required for WCF service to run it successfully.
This file contains following details :
- Language (C# / VB)
- Name of the service
- Where the service code resides
Example of .svc file
<%@ ServiceHost Language="C#/VB" Debug="true/false" CodeBehind="Service code files path" Service="ServiceName" />
We can also write our service code inside but this is not the best practice.