WP7 Gotcha: Showing a Launcher or Chooser will crash while Navigating

Applies To: Silverlight & XNA (anyone using Launchers / Choosers) Quick Bits Always wrap [some launcher object].Show() with a try/catch block which catches InvalidOperationException, since running Show() while navigating (for example, if the user clicks your button multiple times quickly in succession) will cause this Exception to be thrown. The Setup You have a button…

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WP7 Marketplace Tip #2.5 – Free App + Updates Policy Clarified (finally)

It’s been a while, and there’s been a lot of confusion surrounding this topic of “5 free apps”, so here’s the final low down: Unlimited number of paid applications This includes updates to said applications A paid application cannot be made free  5 submissions of free applications Unlimited updates to accepted free apps WARNING: failed submission of free…

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Silverlight Performance at TechEd Europe

If you happen to be down at TechEd Europe this week, don’t forget to come by the Windows Phone 7 and Silverlight booths (they’re opposite each other in the Technical Learning Centre) and say hello. You’ll get to play with some phones from HTC and interact directly with both teams – don’t miss out! Something…

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WP7 Marketplace Tip #2: 5 Free Apps == 5 Free App *Submissions*

Updated Policy! Sure, the App Hub site says: Submit up to five free apps to Windows Phone Marketplace, additional submissions are $19.99 USD But here’s what it really means: Submit up to five free apps (including updates) to the Windows Phone Marketplace, additional submissions (of apps or updates) are $19.99USD FTFY Seriously The policy is simple,…

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