Setting up Web API within WCF Project

I followed these steps and it worked fine:

1. Make sure your WCF service is working correctly.

2. Install WebAPI to your project through Nuget Package Manager

   Install-Package Microsoft.AspNet.WebApi

3. Create Controller folder and write your controller class and methods.

4. Create global.asax file

5. Register routes for your services in Application_Start method.

   protected void Application_Start(object sender, EventArgs e)
   { 
       RegisterRoutes(RouteTable.Routes);
   }
   
   private void RegisterRoutes(RouteCollection routes)
   {
       routes.MapHttpRoute(
   
            "webapi_route",
   
             "/{controller}/{action}/{id}",
   
            new { controller = "controller_name", action = "method_name", id = RouteParameter.Optional }
   
      );
   
       RouteTable.Routes.Add(new ServiceRoute("", new WebServiceHostFactory(), typeof(service_name)));
   }
   

In fact there are no major restrictions on the use of the two technologies within the same project. By default wcf has a different "pipe line" than asp.net, but until this can be changed. Using the configuration below in web.config it is possible to configure wcf to use the same asp.net pipe line thus sharing the whole life cycle of the objects of the request. But do not believe that this approach is usual for all cases, other factors need to be considered to make that decision, for example, how do you plan to distribute your application? When you release a version of wcf you will also be releasing the web.api, in many cases you may not want this result.

<serviceHostingEnvironment aspNetCompatibilityEnabled="true" multipleSiteBindingsEnabled="true" />