Cannot find resource dictionary in WPF application
Solution 1
Make sure that the build action for MetroTheme.xaml is set to Page.
Solution 2
I had the same issue, but setting Build Action = Page did not solve for me. Turned out I needed to use the Pack URI Format. So,
<ResourceDictionary Source="pack://application:,,,/Styles/MetroTheme.xaml"/>
EDIT
Turns out the above will eliminate build error but still results in runtime error. I needed to include full assembly specification for complete resolution (even though all files are in same assembly):
<ResourceDictionary Source="pack://application:,,,/WpfApplication10;component/Styles/MetroTheme.xaml"/>
Solution 3
Sometimes closing Visual Studio and open it again solves this problem.
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Steven Ball
Updated on September 26, 2022Comments
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Steven Ball over 1 year
I'm in the process of building a WPF application and ran into an error when trying to reference a resource dictionary. Inside my WPF application project I have a folder called "Styles" to contain all the xaml style templates for my app:
In my app.xaml file I have this:
<Application.Resources> <ResourceDictionary> <ResourceDictionary.MergedDictionaries> <ResourceDictionary Source="Styles/MetroTheme.xaml" /> </ResourceDictionary.MergedDictionaries> </ResourceDictionary> </Application.Resources>
However, when I hover over the source property I get an error saying "An error occurred while finding the resource dictionary "Styles/MetroTheme.xaml". I can see the xaml file inside the folder both in Visual Studio and in the file system.
I have also tried "/Styles/MetroTheme.xaml" and a pack uri for the source property, both with no success. Any idea why I'm getting this file not found error?
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Andy almost 12 yearsWhat's the build action set to on MetroTheme.xaml? set it to page
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Steven Ball almost 12 yearsThis appears to have taken care of the error. Thank you for the assistance!