Description

CPU intensive process left running after closing a WinForms .Net6 app that uses OleDB. I am not the first person to experience this. Please see following StackOverflow questions C# WinForm - EXE not terminating when closing main form & Reading access database, background process still running on close.

Reproduction Steps

Sample code attached WinFormsApp.zip. For the bug to be replicated, the exe must be opened outside of the visual studio environment.

Expected behavior

All processes would close on application exit.

Actual behavior

Process left running.

Regression?

This issue didn't happen in .Net framework as far I can tell but I didn't specifically test for it.

Known Workarounds

No response

Configuration

No response

Other information

No response