PrintPreviewControl displays a black preview page after assigning an empty PrintDocument

[Olina-Zhang]

.NET version

.NET 11 SDK build: 11.0.100-rc.1.26380.103

Did it work in .NET Framework?

Yes

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

Yes, regression from the PR: #14424

Issue description

After PR #14424, PrintPreviewControl.ResetForeColor() was changed to use SystemColors.ControlText as the default ForeColor. It resolves the inconsistency tracked by GH issue: #14420

But with the new default behavior in .NET 11, assigning a PrintDocument that produces no printable content causes the preview page to render as a solid black page.

As a result, existing applications that preview dark-colored content may experience poor readability due to the black preview background.

Steps to reproduce

1. Create a WinForms application with targeting .NET 11.
2. Add a PrintPreviewControl to the form.
3. Leave its ForeColor unchanged (default value: SystemColors.ControlText).
4. Add PrintDocument and assign it to PrintPreviewControl's Document property
5. Run the application.

Actual Result

The preview page is rendered as a solid black page.

Expected Result

Assigning an empty PrintDocument should not cause the preview page to become black.