If you wanted to use Visual Studio—the premier C# and .NET development environment, the one that almost every C# developer calls home—you were out of luck. With Xamarin 2.0, that all changes.

In another step for Microsoft, the Xamarin SDK will be made open source and released on Github for all to see and use, including the Xamarin Forms library for creating quick and easy user interfaces.

The (just released yesterday) Visual Studio 2015 Update 2 installer will install Xamarin for you (it's one of several checkboxes under Cross-Platform Development), and IIRC will install it by ...

Xamarin today unveiled version 4 of its cross-platform development suite, featuring a new Xamarin Mac Agent that lets developers build iOS apps completely from within the Microsoft Visual Studio IDE.