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Windows Phone 7 development tips

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Windows Phone 7 publishing Checklist

Submitting an app to the App Hub can be quite long, and you should really prepare this carefully as any mistake can cause you a one week delay for your application publication.

Here is a list of points you should REALLY check or prepare before starting your submission :

  1. Your application must contain contact and legal information.
  2. Your XAP must be built in release, applications built in debug will be rejected.
  3. Prepare the material needed to submit your application:
    • A small mobile app tile icon (required), used in the phone Windows Phone Marketplace, 99 x 99 pixels in size. Must be a PNG without transparency.
    • A large mobile app tile icon (required), used in the phone Windows Phone Marketplace, 173 x 173 pixels in size. Must be a PNG without transparency.
    • A large PC app tile icon (required), used in the phone Windows Phone Marketplace, 200 x 200 pixels in size. Must be a PNG without transparency.
    • Application icon image : 62×62 PNG, can use transparency. Same as image included in your application.
    • Application tile image : 173×173 PNG, can use transparency. Same as image included in your application.
    • Application screenshots : 800×480 PNG, must not use transparency.
    • Application description : Text describing your application, used on marketplace to introduce your application.
    • Featured app description : Very short description used if your application gets featured on the marketplace (quite hard to achieve without having Microsoft contacts, so very optional).
    • Keywords : List of keywords, used on marketplace for search.
    • Define which category & subcategory you want your application to go on the marketplace.
  4. Your XAP must be built in release, applications built in debug will be rejected.
  5. Your application must resume normally on any page.
  6. Your application must display normally whatever theme is used (both Background and Accent color).
  7. Check that for any task making the phone not responsive for more than 3 seconds, a visual indicator such as a loading bar must be used.
  8. The application must render the first screen within 5 seconds after launch.
  9. Within 20 seconds after launch, the application must be responsive to user input.
  10. Any page displaying a popup should close this popup when Back key is pressed.
  11. Your application must not use over 90Mb of memory at any time. Many different memory use trackers can be used to check this, or by yourself using DeviceExtendedProperties.
  12. Be sure that all your text content is localized.

This list is of course not exhaustive, but most application rejection comes from these points.