Startup.cs

using System;
using Microsoft.AspNetCore.Builder;
using Microsoft.AspNetCore.Hosting;
using Microsoft.AspNetCore.Http;

namespace ConsoleApplication
{
    public class Startup
    {
        public void Configure(IApplicationBuilder app)
        {
            app.Run(context => context.Response.WriteAsync("Hello World ASP.NET Core"));
        }
    }
}