Updating the Closing event handlers to FormClosing event handlers doesn't work with Application.Exit() sometimes

### .NET version

.NET 10.0

### Did it work in .NET Framework?

No

### Did it work in any of the earlier releases of .NET Core or .NET 5+?

Unknown

### Issue description

When a Window Forms main form creates a second form, Application.Exit() doesn't work with the FormClosing event but does work with the Closing event when the event argument Cancel value is set to true by the second form.

### Steps to reproduce