Publish Single File (Release) fails for WPF .NET Core 3.1 application

Question

I\'m trying to publish a WPF Application (to a folder) targeting .NET Core 3.1, using Publish Single File, targeting win-x86. The application publishes fine for Debug, but fails

Answer 1

I had the same problem with a WPF application :

VS2019 16.3 and dotnet Core 3.0 - publish worked fine.

Updated to VS2019 16.4.1 and dotnet Core 3.1 - publish failed as described.

Only difference is I am targeting X64.

After multiple attempts editing the publish FolderProfile (none of which fixed the problem), I deleted the FolderProfile completely and created a new one targeting a different folder.

Publish works again.

Hope this helps.