Silverlight for Windows Phone 7 Performance Session at PDC!

  It’s that time of year again – PDC 2010 kicks of tomorrow! Join the Silverlight Performance Team as we take you through the high level analysis of common performance issues that apps commonly run into. I’ll be giving a live session titled “Optimizing Performance for Silverlight WP7 Apps” at 3:15pm (PDT)  on day 1 (28…

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Silverlight: Why do I get 0x8000ffff when using WriteableBitmap on an Element

I’m working on a WP7 library which helps analyze your VisualTree and to provide a visual aid, I take WriteableBitmap snaps of the elements. Unfortunately I (seemingly) randomly encounter the following exception:   A first chance exception of type ‘System.Exception’ occurred in System.Windows.dll When digging into the exception you may find that the error is actually…

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WP7 Marketplace Tip #1: Submit one app with multiple locales

… as opposed to multiple apps, each with a different locale. Why? If these are free apps, then each language will count towards your free app quota (you get 5 free apps that you don’t need to pay certification costs for) Regardless of price, each app will need to go through independent certification (which will…

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Are the Windows Phone 7 Developer Tools Still Free?

YES! Visit: http://create.msdn.com/en-us/home/getting_started and click “Install Now” to download the tools, directly, for free, without the need to sign up first. Ever since the release of the new developer portal (http://create.msdn.com) I’ve been hearing that you need to signup to get the tools, hence they must no longer be free. In reality, what happened is…

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WP7 Perf Tip #6: Be smart about graphics (use JPEG where possible)

Take Away’s: Wherever possible (i.e. no transparency) use JPEG images since these decode faster than PNG Make sure your images are correctly sized (you don’t want to waste cycles with resizing on the fly) Always compile your images with a “Build Action” of “Content” instead of the default “Resource” Some Background: JPEG (JPG) decodes faster,…

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