[Dark Mode] the DropDownButton of Type Here not in dark mode in DemoConsole application

.NET version

.NET 9.0.100-rc.2.24453.35

Did it work in .NET Framework?

No

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

This is a new feature Dark Mode: https://github.com/dotnet/winforms/pull/11857

Issue description

The DropDownButton of Type Here not in dark mode.

Steps to reproduce

1. Clone the DemoConsole in Winforms repo
2. Enable Dark mode by adding below code lines in the Program.cs file under DemoConsole project

#pragma warning disable WFO5001
Application.SetColorMode(SystemColorMode.Dark);

3. Build and run the DemoConsole project
4. Observe the color for the DropDownButton of Type Here item