.net6.0 app publish in anyCPU does not run on windows 32bits

Description

I try to run my .net6.0 app on 32 bits system and when I run the execute file it’s thrown an error :

When I am building the app only with x86 CPU the application it’s running correctly.

Reproduction Steps

1. Create new consol projetct in .net6.0
2. In the main code just put that :

using System;
Console.WriteLine("Hello, World!");

1. And now publish with this profile settings :

1. Now test to execute the project on windows x86

Expected behavior

Normally the app can be excute on any cpu.

Actual behavior

The app execution does not work and it’s throwing this error:

Regression?

It’s working in .net framework.

Known Workarounds

No response

Configuration

No response

Other information

No response

[lextm]

Summarized the issue, the cause and the solution in a simpler way https://learn.microsoft.com/en-us/answers/questions/1084428/wpf-application-does-not-work-on-32bit-os.html?childToView=1084800#answer-1084800

[vitek-karas]

The fact this works in .NET Framework is… special. .NET Framework has an OS level hook which makes this possible. .NET 5+ doesn’t have any OS hooks, and so it has to play by the same rules as everybody else. Which is that .exe is native code and that can only run on the architecture it was built for.

The idea of portable .NET apps is that you don’t use the executable to run them, instead you use dotnet app.dll to run them - that should work on any architecture.