dotnet/winforms

[DarkMode]The Form1 title bar change to white color after change the ShowInTaskbar property

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#12,992 创建于 2025年2月20日

 (4 条评论) (0 个反应) (1 位负责人)C# (922 个派生)batch import
area-DarkModehelp wanted

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描述

.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.

Image

Steps to reproduce

  1. Create a winforms .NET Core project with a button control.
  2. Enable DarkMode by Application.SetColorMode(SystemColorMode.Dark) in Program.cs file.
  3. Double click button control and add below code to button click event. `this.ShowInTaskbar = !this.ShowInTaskbar;
  4. Build and run.
  5. Click button control.

More Info:

  1. 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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