Controls inside GroupBox no longer reflect inherited ForeColor/BackColor updates in VisualStylesMode.Net11 #14778

.NET version

.NET 11.0.100-preview.7.26365.114 + Private dlls built from Net11/Integration-3 branch of https://github.com/KlausLoeffelmann/winforms repo

Did it work in .NET Framework?

Yes

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

Not support, new feature

Issue description

Issue#1:
When a GroupBox ForeColor is changed at design time, child controls such as Button and CheckBox do not update their text color accordingly with VisualStylesMode.Net11 mode.

Behavior differs from VisualStylesMode.Classic.

Issue#2:
When a GroupBox BackColor is changed, a Button contained within the GroupBox unexpectedly reflects inherited BackColor updates with VisualStylesMode.Net11 mode.

Behavior differs from VisualStylesMode.Classic.

Steps to reproduce

1. Create a WinForms application targeting .NET 11
2. Set VisualStylesMode = VisualStylesMode.Net11
3. Add a GroupBox to form designer and update its BackColor and ForeColor
4. Add Button and CheckBox to GroupBox
5. Observe the BackColor and ForeColor of Button and CheckBox