Not all file handles are closed after Cef.Shutdown

[Mik4sa]

Describe the bug
I'm coming from CefSharp and was told to open an issue here. I hope this is fine.
This is the original issue: cefsharp/CefSharp#4852

I have set a custom RootCache path and want to delete that cache folder after Cef.Shutdown is called (during the application shutdown). But using the (new) Chrome Bootstrap some files still have open handles so the whole folder can't be deleted. Changing the runtime back to Alloy Bootstrap (in the same version) the folder can be deleted afterwards as expected.

Note: There is a big difference in what is written to that directory (not sure if this is a problem too).
This is what I get with Alloy Bootstrap:

and this is what I get with Chrome Bootstrap:

Expected behavior
All file handles should be cleared after Cef.Shutdown was successfully called.

Versions (please complete the following information):

• OS: Windows 11 (Version 23H2 Build 22631.3810)
• CEF Version: 126.2.7

Additional context

Does the problem reproduce with the cefclient or cefsimple sample application at the same version?

Not tested, but I don't think so since the folder isn't deleted afaik.

Does the problem reproduce with Google Chrome at the same version?

No

[magreenblatt]

What are the files with open handles? See here for tools that will tell you.

[Mik4sa]

Everything in the orange box:

Note that my RootCache path is: %localappdata%/CefSharp/RootCache

[magreenblatt]

Are child processes still running after you call CefShutdown?

[Mik4sa]

Doesn't look so.

Before Cef.Shutdown:

After Cef.Shutdown:

[magreenblatt]

OK. Some of these files (like chrome_debug.log) likely aren't closed until all child processes have terminated.

[Mik4sa]

But all child processes are closed. The one process marked in the second screenshot is the main process (CefSharp...exe)

[magreenblatt]

But all child processes are closed. The one process marked in the second screenshot is the main process (CefSharp...exe)

Right, but in case they're not closed immediately after CefShutdown returns (for you or someone else), it could still be an issue.

[tomeroed]

We are also facing this exact issue, with no current solution.
The following files are being held and can not be deleted when the application exits.

[SASoper]

This issue still exists in CefSharp.WinForms version 128.4.9.