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Editorial Team
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Asked: 2026-06-15T02:15:41+00:00

I am trying to debug this issue for last 2 days, I have tried

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I am trying to debug this issue for last 2 days, I have tried all the solutions available on SO and Microsoft connect but can’t seem to find any solution.

I downloaded the Windows Phone 8 sdk, installed and created a new project, but when I tried to edit App.xaml I got

XamlParseException: Cannot find a Resource with the Name/Key PhoneProgressBarBackgroundBrush [Line: 729 Position: 39]
at at MS.Internal.XcpImports.CreateFromXaml(String xamlString, Boolean createNamescope, Boolean requireDefaultNamespace, Boolean allowEventHandlers, Boolean expandTemplatesDuringParse, Boolean trimDeclaredEncoding)
at System.Windows.Controls.Control.GetBuiltInStyle(IntPtr nativeTarget, IntPtr& nativeStyle)

Please help me resolve this issue.

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1 Answer

  1. Editorial Team

    Had same issue, reinstalling WP8 SDK didn’t help either.

    The problem can be overcome by adding ThemeResources.xaml to the project resources as follows:

    Blend:
    In project view, right click Resources folder and choose “Link to existing item…”. Add C:\Program Files (x86)\Microsoft SDKs\Windows Phone\v8.0\Design\ThemeResources.xaml there and it should work.

    VS2012:
    In Solution Explorer, right click folder “Resources” and choose “Add” -> “Existing item…”. Navigate to C:\Program Files (x86)\Microsoft SDKs\Windows Phone\v8.0\Design\ThemeResources.xaml and choose “Add as link”.

    I’ve got no idea about the root cause i.e. why ThemeResources.xaml isn’t included in the new project.

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