[C#][WebApi] How to create a C# Console Application and configure Owin to host WebApi

From : https://medium.com/@Rocco_Sen/how-to-create-a-c-console-application-and-configure-owin-to-host-webapi-3f3e772666cf

3. Create the Startup.cs class for OWIN configuration. Create this in the root of your project.
   using Microsoft.Owin;
   using Owin;
   using System.Web.Http;
   [assembly: OwinStartup(typeof(OwinAPI.Startup))]
   namespace OwinAPI
   {
   public class Startup
   {
   public void Configuration(IAppBuilder app)
   {
   // Configure Web API for self-host.
   // Note: I prefer my routes to be "api/{controller}/{action}" instead of "api/{controller}/{id}"
   HttpConfiguration config = new HttpConfiguration();
   config.Routes.MapHttpRoute(
   name: "DefaultApi",
   routeTemplate: "api/{controller}/{action}",
   defaults: new { id = RouteParameter.Optional }
   );
   app.UseWebApi(config);
   }
   }
   }
4. Edit static void main to host OWIN.
   Note: I’m using http://localhost:9000. Use whatever URL you would like OWIN to host.

using Microsoft.Owin.Hosting;
using System;
namespace OwinAPI
{
class Program
{
const string url = "http://localhost:9000";
static void Main(string[] args)
{
using (WebApp.Start(url))
{
Console.WriteLine("Server started at:" + url);
Console.ReadLine();
}
}
}
}
5. Add an API controller.
I like to group my controllers together in a folder called “Controller”. Here is the code for the ApiController. It just returns an array of words.

using System.Collections.Generic;
using System.Web.Http;
namespace OwinAPI.Controller
{
public class TestController : ApiController
{
public IEnumerable GetTest()
{
return new string[] { "One", "Two", "Three" };
}
}
}
6. Test (Make a request to URL see if everything works.)
localhost:9000/api/test/gettest
Testing out the API