Here’s some stellar news for Windows Phone developers. Microsoft is rumored to buy software development company Xamarin. Microsoft and Xamarin have always had a cozy relationship. Last November the two tightened their marketing and technical ties with a new partnership deal. Xamarin is a popular tool because it allows developers to create Android and iOS applications uses C#, the development language of choice for a lot of Windows Phone and Windows 8 developers. Now Microsoft might buy Xamarin.