dotnet
[DarkMode]The Form1 title bar change to white color after change the ShowInTaskbar property
.NET version
.NET 10.0.100-preview.2.25118.3
Did it work in .NET Framework?
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
The Form1 title bar change to white color after change the ShowInTaskbar property.
Steps to reproduce
- Create a winforms .NET Core project with a button control.
- Enable DarkMode by Application.SetColorMode(SystemColorMode.Dark) in Program.cs file.
- Double click button control and add below code to button click event. `this.ShowInTaskbar = !this.ShowInTaskbar;
- Build and run.
- Click button control.
More Info:
- This issue also repro in FormShowinTaskbar test in WinformsControlTest app.
https://github.com/user-attachments/assets/92e54b94-a73b-4524-bec7-cfaef740d089
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My assumption is, that all of those property causes a handle recreation, and I guess that then the dark-mode request does not get send off.
My assumption is, that all of those property causes a handle recreation, and I guess that then the dark-mode request does not get send off.
My guess is to have handle recreation deferred to a separate specific method that is then used everywhere a handle recreation is needed that then honors the mode request as well so then it would fix this issue.
Still repro in the latest .NET 10 SDK build: 10.0.100-preview.6.25311.107, so reopen the issue.
https://github.com/user-attachments/assets/b85aea93-7ff4-4bcf-8398-0d572b7e146b
