[DarkMode] MDIParent MainMenuStrip Bitmaps draw with light Colors

[memoarfaa]

.NET version

.NET version

.NET 10.0.100-preview5.25266.103

Did it work in .NET Framework?

No

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

No

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

No, also repro in .NET 9.0 which it started to be supported.

Issue description

Issue description

MDIParent MainMenuStrip Bitmaps draw with light Colors

Steps to reproduce

1. Create a winforms .NET Core project.
2. Enable DarkMode by Application.SetColorMode(SystemColorMode.Dark) in Program.cs file.
3. Build and run MDIParent.

[KlausLoeffelmann]

Is this only the case with MDI-Clients when you merge menues, or is this a general issue, depending on the Bitmap?

[memoarfaa]

Is this only the case with MDI-Clients when you merge menues, or is this a general issue, depending on the Bitmap?

The Bitmap is drawn using DrawFrameControl method.
See
https://github.com/dotnet/winforms/blob/main/src/System.Windows.Forms/System/Windows/Forms/Controls/ToolStrips/ToolStripMenuItem.cs#L655