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The following code works on debug builds, it works on release builds and it works when manually executing a published executable in the published dir (eg "..\Application Files\WindowsApp1_1_0_1_0\WindowsApp1.exe").

However, when running the .application to execute the published application, it throws the following error: "Illegal characters in path".

I am using the '\\?\' notation because my application needs to support long file names. I believe this notation is supported from .net framework 4.7.2.

    For Each f As String In IO.Directory.GetFiles("\\?\c:\")
        Console.WriteLine(f)
    Next

Environment: VS 2022 publishing a winforms vb.net app (.net framework 4.8).

Why would this code work perfectly in all cases except when running a published .application file and how do I work around this issue while still being able to use long file names on .net framework 4.8?

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  • Did you include <ws2:longPathAware>true</ws2:longPathAware> in the app config as documented learn.microsoft.com/en-us/windows/win32/fileio/… Commented Mar 31 at 23:55
  • Tried that, did not make a difference Commented Apr 2 at 22:32
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