How to Publish DotNet Core (v5.0) Web Api to IIS?

Question

First thing I did was install the .NET Core Hosting Bundle on the IIS server; I have also stopped and re-started IIS;

I've tested and can confirm my app runs on Krestel, but I am struggling to get it running (in-proc) in IIS;

Running with Krestel (good/pass):

1. On my local PC, "Publish" as Framework-dependent to MyAppFolder (this folder now contains all the compiled assets for my app, including exec and dll's)

2. Move MyAppFolder somewhere on the IIS server;

3. Run the executable (MyWebApi.exe) directly on the cmd line , I get the default Now listening on: http://localhost:5000

If I navigate to an end point with a Browser, http://localhost:5000/MyResource/123 , this GET request produces the desired json result;

Running with IIS (bad/fail):

1. As stated above, NET Core Hosting Bundle is installed, including stop/start the iis server
2. Created an App Pool (No Managed Code)
3. Created a Virtual App on the IIS Manager (MyVirtualApp), which points to the folder containing all the assets for my app (same folder that works with Krestel)

That should be it, I think, but it doesn't work ? Did I miss any steps ? When I point a Browser to my resource http://localhost/MyVirtualApp/MyResource/123 , I get a 404!

Additional Info:

//Program.cs
public static IHostBuilder CreateHostBuilder(string[] args) =>
        Host.CreateDefaultBuilder(args)
        .ConfigureWebHostDefaults(webBuilder =>
        {
            webBuilder.UseStartup<Startup>();
        });

Docs say I don't need to explicitly UseIIS, as CreateDefaultBuilder will use IIS or Krestel;

Also, dotnet --info gives the below:

Host (useful for support):
  Version: 5.0.17
  Commit:  6a98414363

.NET SDKs installed:
  No SDKs were found.

.NET runtimes installed:
  Microsoft.AspNetCore.App 5.0.17 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
  Microsoft.NETCore.App 5.0.17 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]

To install additional .NET runtimes or SDKs:
  https://aka.ms/dotnet-download

The 404 Error page: (as given by IIS)

Detailed Error Information:
Module:         IIS Web Core
Notification:   MapRequestHandler
Handler:        StaticFile
Error Code: 0x80070002

This IIS error appears to be related to routing, Routing HTTP Error 404.0 0x80070002

Answer 1

It turns out the "target folder" produced by the "Publish" wizard in Visual Studio produces a parent folder containing my app's exe and dll's, plus children subfolders called publish, ref, runtimes;

In IIS I configured my site's physical path to be at the parent folder level, when it should have been to the publish folder ! (I see no reason for the team at MS to generate files at the parent folder, and again inside the publish folder - why double up and make it confusing !).