What's New with WinForms in .NET 9?
summary
Demos show concrete .NET 9 WinForms changes: adding forceDesignerDpiUnaware to the project keeps resx coordinates stable across 125%/100% DPI (only the edited button text changes), calling Application.SetDefaultDarkMode(DarkMode.Enabled) themes stock Win32-wrapped controls, new BindableComponent lets ToolStrip items bind to MVVM viewmodel commands generated by the Community Toolkit (fixes sorting and status updates), async support includes PeriodicTimer + InvokeAsync for a nonblocking spinner, Semantic Kernel parses natural-language dates successfully, and accessibility moves from MSAA to UIA.
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chapters (12)
- 0:00Introduction to WinForms
- 1:18DPI unaware design mode
- 7:14Implementing dark mode
- 16:41WinForms modernization
- 21:03Accessibility and community
- 23:54Visual Basic support
- 26:24Key principles for .NET 9
- 30:00Modern data binding and MVVM
- 38:26Future road map
- 43:41Async programming support
- 49:22Microsoft client development
- 51:53AI integration demonstration
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