ComboBox displays the selected item with a dark blue selection background when DropDownStyle is DropDownList in NET11 mode

[Olina-Zhang]

.NET version

.NET11 SDK build: 11.0.100-rc.1.26413.103 + private dlls built from main branch of Winforms repo

Did it work in .NET Framework?

Not tested/verified

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

Not support, new feature of #14809

Issue description

When a WinForms ComboBox is configured with DropDownStyle = DropDownList and VisualStyleMode = NET11, the selected item(Text area) is rendered with a dark blue background and white text after the drop-down list is closed.

SystemColorMode with Light:

SystemColorMode with Dark:

The selected item remains displayed with this dark blue selection background in the ComboBox text area, which differs from the rendering in VisualStyleMode = Classic.
SystemColorMode with Light:

SystemColorMode with Dark:

Steps to reproduce

1. Create a WinForms application targeting .NET 11.
2. Add a ComboBox to the form.
3. Set DropDownStyle to DropDownList.
4. Add one or more items to the ComboBox.
5. Set VisualStyleMode to NET11.
6. Run the application.
7. Open the ComboBox and select an item.
8. Close the drop-down list.

[KlausLoeffelmann]

FWIW, this is by Design. It is the modern-rendered focus indicator. You can tab out of it.
I would leave it as it is, except someone has issues with it.

@LeafShi1, @SimonZhao888, @ricardobossan - what's your take here?

[SimonZhao888]

@LeafShi1, @SimonZhao888, @ricardobossan - what's your take here?

I completely agree with you.

[LeafShi1]

FWIW, this is by Design. It is the modern-rendered focus indicator. You can tab out of it. I would leave it as it is, except someone has issues with it.

@LeafShi1, @SimonZhao888, @ricardobossan - what's your take here?

I don't think this is a bug.

Compared to Classic, the focused state is much clearer in NET11.

My only concern is that the blue fill looks a bit heavy in Dark Mode, and the text contrast is insufficient. Other than that, I would leave it as-is.

I wonder whether a lighter accent fill, combined with a dedicated focus indicator such as an accent border, would make the state clearer while remaining consistent with the direction we're taking for other controls.