At Xamarin Evolve this morning, .NET Foundation Director Miguel de Icaza officially open sourced the Xamarin SDKs for Android, iOS, and Mac and contributed them to the .NET Foundation under the MIT license. This includes Mono runtime ports for iOS and Android, bindings to the native APIs on these platforms, the basic command-line build tools, and a full, cross-platform UI stack in Xamarin.Forms. Today’s open source release delivers on Scott Guthrie’s announcements at //build last month and our shared vision of open source .NET on every single device, from mobile to desktop to cloud.

I'm pleased to also see that the Xamarin engineering team join the .NET Core teams working fully in the open on GitHub, continuing to make the Xamarin SDKs better for everyone, everywhere. The future of native cross-platform mobile .NET development is now in the hands of every developer, and we’re excited to see where you’ll take the platform.

Take a look at Miguel's blog post for more information or go to to get involved.