Compile error in web-api-selfhost application

See more:

C#

ASP.NET

C#4.0

MVC

Hello all,

I was trying to create a web-api-selfhost application, But ended up with an exception. Here is my code which caused the error.

var config = new HttpSelfHostConfiguration("http://localhost:8080");

config.Routes.MapHttpRoute("API Default", "api/{controller}/{id}",new { id = RouteParameter.Optional });//This line caused error

            using (HttpSelfHostServer server = new HttpSelfHostServer(config))
            {
                server.OpenAsync().Wait();

                Console.WriteLine("Press Enter to quit.");
                Console.ReadLine();
            }

This is the exception which I have received.

The type 'System.Web.Routing.RouteCollection' is defined in an assembly that is not referenced. You must add a reference to assembly 'System.Web, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a'.

Should I import any other namespace? Any help on this would be appreciated.

Thanks & Regards
Sebastian