Apps with a custom background flash a white background for a couple frames on some devices
See original GitHub issue- .NET Core Version: (e.g. 3.0 Preview1, or daily build number, use
dotnet --info
) 6.0.100 - Windows version: (
winver
) Windows 11 10.0.22000 - Does the bug reproduce also in WPF for .NET Framework 4.8?:
- Is this bug related specifically to tooling in Visual Studio (e.g. XAML Designer, Code editing, etc…)? If yes, please file the issue via the instructions here.
- Security issues and bugs should be reported privately, learn more via our responsible disclosure guidelines.
Problem description: Apps with a custom background flash a white background for a couple frames on some devices (previously asked Stack overflow to no avail, pointed to likely a software issue) Actual behavior: Window flashes white before fully loading. Expected behavior: Window opens with the correct background color instantly Minimal repro:
dotnet new wpf
edit MainWindow.xaml to have a background attribute
dotnet build
and run the app.
Issue Analytics
- State:
- Created 2 years ago
- Reactions:5
- Comments:8 (4 by maintainers)
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This also started to happen on my machine like a week ago. It’s does not seem to be isolated to WPF as it also happens with Edge. See (increased gif frame delay to 250 ms to make it really visible):![window_white_flash](https://user-images.githubusercontent.com/1971030/146987577-76512221-de63-4f11-80cb-b50b8de9d1c1.gif)
@torum As i already wrote above, this is not a pure WPF issue. The underlying problem is caused by Windows itself. ControlzEx has code to mitigate the white flash and the resize flickering.