Sams Teach Yourself Windows® Phone 7 Application Development in 24 Hours by Scott Dorman Kevin Wolf Nikita Polyakov Joe Healy

Author:Scott Dorman, Kevin Wolf, Nikita Polyakov, Joe Healy
Language: eng
Format: epub
ISBN: 9780132678797
Publisher: Sams

Tuning Application Startup

To pass Windows Phone 7 Marketplace Certification, your first screen must be visible within 5 seconds and your application must respond to user input within 20 seconds.

The biggest thing you can do to improve the perception of startup time of your application is to use a splash screen. When your Windows Phone 7 application starts, the runtime looks for a file called SplashScreenImage.jpg as content in your project. If this file is found, it will be immediately displayed before starting to run your program initialization code. If your application takes more than 1 second to start, you should consider using a splash screen. When you create a new application, a default image file gets added to your solution, as shown in Figure 13.1.

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