How to find "content files" within a publishsinglefile .exe context (with unknow TEMP folder)

EDIT Actually I was wrong, I got a false diagnostic of my issue.

There were indeed a bug in .Net Core 3+ with SingleFile publishing with AppContext.BaseDirectory. But it is fixed now in .Net 5.

I saw it when enabling a primitive log system when my WPF is closing to debug the published application.

The mistake I made was using pack URI to access my content files.

This pack URI always work as a relative path from execution, so from the temporary extracted folder in case of SingleFile publishing, resulting in not finding the content file stored in AppContext.BaseDirectory.

So I had to remove using pack URI (Appending pack://application:,,, to the relative path) and use an absolute path (Path.Combine(AppContext.BaseDirectory,@MyContentFile)) instead.

For the record here was my question :

I have my WPF application that run. I have both ressource files and content files (some config and modifiable from user icons files).

When I publish it (via dotnet publish) it work. But when I publish it as a single file (via -p:PublishSingleFile=true parameter) then, as I understand here, The resulting application is silently extracted in a "random" temporary folder. So using my previously Path.Combine(AppContext.BaseDirectory,@MyContentFile) doesn't work as AppContext.BaseDirectory now point to this temporary, unknown from me, folder.

How can I get the path of my SingleFile, which is the root of my relative content files, at runtime, so from this unknown temporary extracted folder.

Thanks.