Today, we are excited to announce that are open sourcing WPF, Windows Forms, and WinUI, so the three major Windows UX technologies will be open sourced. For the first time ever, the community will be able to see the development of WPF, Windows Forms, and WinUI happen in the open and we will take contributions for these frameworks on .NET Core. The first wave of code will be available in GitHub today and more will appear over the next few months.