If youre a .NET developer looking to build tablet apps, this practical book takes you step-by-step through the process of developing apps for the Windows Store. Youll learn how to use Microsofts Modern UI design language with Windows 8.1 and WinRT 8.1.1 by building a line-of-business mobile app with C# through the course of the book.To develop the app, youll work with the same system details and design specs that apply to retail apps, such as persistence, backend service, and Windows 8 features for sharing and search. Youll learn how to develop the code, incorporate third-party open source products, and package your app for the Windows Store.Build a UI with XAML and the Model/View/View-Model patternUnderstand asynchronyand rediscover threads and parallelismStore data and system settings locally with SQLiteUse app bars for commands and the settings charm for Help optionsPresent notifications as tile updates, badges, or toast popupsHelp users visualize locations and tag activities to a mapEnable apps to share data and run side-by-side in the UIImplement functionality for running tasks in the background