using System;

using System.Net.Http;

using System.Threading;

using System.Threading.Tasks;

using Microsoft.AspNetCore;

using Microsoft.AspNetCore.Builder;

using Microsoft.AspNetCore.Hosting;

using Microsoft.Extensions.DependencyInjection;

public class Program

{

    public static void Main(string[] args)

    {

        var host = WebHost.CreateDefaultBuilder(args)

                          .UseStartup<Startup>()

                          .UseUrls("http://0.0.0.0:5000/")

                          .Build();

        Task.Run(() => {

            host.Run(); 

        });

        Thread.Sleep(500);

        var output = new HttpClient().GetStringAsync("http://localhost:5000/any/type/of/path").Result;

        Console.WriteLine(output);

    }

}

​

public class Startup: IStartup

{   

    public IServiceProvider ConfigureServices(IServiceCollection services){

        return services.BuildServiceProvider();

    }

    public void Configure(IApplicationBuilder builder)

        {

            builder.Run(context =>

            {

                var data = System.Text.Encoding.UTF8.GetBytes("Hello World!");

                context.Response.Body.Write(data, 0, data.Length);

                return Task.CompletedTask;

            });

        }

}