Quickstart: Add a mobile service (.NET backend) – covers debugging etc… Use this for debugging first.
How to use controllers to access data in mobile services (.NET backend) – Shows how to add new Tables and Models
How to create custom APIs and scheduled jobs in a mobile service (.NET backend)
Mobile Services .NET Backend: Initializers and Model Updates (Schema Changes)
Create a Staging .NET Backend for Testing
Debugging .NET Backend in Visual Studio
How to use Fiddler with Windows Azure Mobile Services .NET (Preview) Backend