How to clear the cache folder when closing my application

[azerios]

Dear,

I'm trying to clear the cache folder when I'm stopping/closing my application.

My code is the following :
Cef.ClearCrossOriginWhitelist();
Cef.ClearSchemeHandlerFactories();
Cef.PreShutdown();
Cef.Shutdown();
Directory.Delete(_cefsharpCachePath, recursive: true);

The issue is that one directory is throwing an exception as segmentation_platform and two files :
ukm_db
ukm_db-journal

How can I stop any process to using them and delete the cache folder ?

Thanks for your help