While at NDC, Carl and Richard talk to Laurent Bugnion about his experiences building tablet applications. Laurent and his company have been building tablet and mobile applications for a variety of companies over the past few years. The conversation starts out on tools, talking about C#/XAML vs. WinJS development (C# is winning) and the focus of Windows 8.1 support. Laurent also talks about the success of the Portable Class Libraries, Xamarin support for C# in iOS and Android and more.