UseStaticFiles() throws error "Connection refused" - asp.net-core

Question

I have problem with serving static file in asp.net core. I am really new to it. Just followed a tutorial from pluralsight and stuck here.
I have added index.html in wwwroot folder, and added dependencies for static file in Json, but still does not seems to work. Any help would be appreciated.
using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;
using Microsoft.AspNetCore.Builder;
using Microsoft.AspNetCore.Hosting;
using Microsoft.AspNetCore.Http;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.Logging;
namespace TheWorld
{
public class Startup
{
// This method gets called by the runtime. Use this method to add services to the container.
// For more information on how to configure your application, visit http://go.microsoft.com/fwlink/?LinkID=398940
public void ConfigureServices(IServiceCollection services)
{
}
// This method gets called by the runtime. Use this method to configure the HTTP request pipeline.
public void Configure(IApplicationBuilder app, IHostingEnvironment env, ILoggerFactory loggerFactory)
{
app.UseStaticFiles();
// app.Run(async (context) =>
// {
// await context.Response.WriteAsync("Hello World!");
// });
}
}
}
And this is my project.json
{
"dependencies": {
"Microsoft.NETCore.App": {
"version": "1.0.1",
"type": "platform"
},
"Microsoft.AspNetCore.Diagnostics": "1.0.0",
"Microsoft.AspNetCore.Server.IISIntegration": "1.0.0",
"Microsoft.AspNetCore.Server.Kestrel": "1.0.1",
"Microsoft.Extensions.Logging.Console": "1.0.0",
"Microsoft.AspNetCore.StaticFiles": "1.0.0"
},
"tools": {
"Microsoft.AspNetCore.Server.IISIntegration.Tools": "1.0.0-preview2-final"
},
"frameworks": {
"netcoreapp1.0": {
"imports": [
"dotnet5.6",
"portable-net45+win8"
]
}
},
"buildOptions": {
"emitEntryPoint": true,
"preserveCompilationContext": true
},
"runtimeOptions": {
"configProperties": {
"System.GC.Server": true
}
},
"publishOptions": {
"include": [
"wwwroot",
"web.config"
]
},
"scripts": {
"postpublish": [ "dotnet publish-iis --publish-folder %publish:OutputPath% --framework %publish:FullTargetFramework%" ]
}
}

Answer 1

In order for your Web app to serve a default page without the user having to fully qualify the URI, call the UseDefaultFiles extension method from Startup.Configure as follows.
public void Configure(IApplicationBuilder app)
{
app.UseDefaultFiles();
app.UseStaticFiles();
}
UseDefaultFiles must be called before UseStaticFiles to serve the default file.
Reference: https://learn.microsoft.com/en-us/aspnet/core/fundamentals/static-files#serving-default-files