Announcing open source of WPF, Windows Forms, and WinUI

At Build 2018, I outlined our approach to helping you be more productive when developing apps, including the introduction of.NET Core 3.0. We also started decoupling many parts of the Windows development platform, so you can adopt technologies incrementally. Today at Microsoft Connect(); 2018 Conference we shared the next steps - specifically to support innovations in UI:.NET Core 3.0 Preview 1 adds support for building client apps using Windows Presentation Foundation (WPF), Windows Forms, and XAML Islands.
WPF, Windows Forms, and Windows UI XAML Library (WinUI) are now open source, so you can create experiences with the freedom you want.