Write backend Mobile Service logic by using .NET and the ASP.NET Web API framework. Use the ASP.NET Web API, Visual Studio, and Mobile Services to build great mobile apps, and integrate features such as mobile authentication and push notifications. Use Web API features such as the OData controller and third-party Web API-based frameworks such as Breeze, and debug your Mobile Services .NET backend by using Visual Studio (running locally on your computer or remotely in Azure).
Mobile Services runs, manages, monitors, and scales your Web API for you.
Learn more on Scott Guthrie's blog
, or check out these Mobile Services .NET tutorials: