Developer technologies | Windows Presentation Foundation
A part of the .NET Framework that provides a unified programming model for building line-of-business desktop applications on Windows.
What's the best approach for global theme resources in WPF Class Library when App.xaml is not available?
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(124.80000000000001, 20%, 22%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3ELC%3C/text%3E%3C/svg%3E)
Lucas Cordeiro
0
Reputation points
What is the recommended approach for globally registering theme resources in a WPF class library ?
Are there official patterns or alternatives to App.xaml that can provide similar global resource resolution capabilities in this scenario?
We've also created a discussion in the official WPF repository: https://github.com/dotnet/wpf/discussions/11075
Developer technologies | Windows Presentation Foundation
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![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(115.19999999999999, 47%, 21%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3ESN%3C/text%3E%3C/svg%3E)
Starry Night 615 Reputation points2025-08-29T15:08:59.14+00:00 I have found that lindexi's solution in this discussion is to add the following code to csproj:
<ApplicationDefinition Include="App_MakeReshaperHappy.xaml" Condition="false"> <Generator>MSBuild:Compile</Generator> <SubType>Designer</SubType> </ApplicationDefinition>Have you tried it?
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Starry Night 615 Reputation points
2025-09-09T00:39:17.6066667+00:00 Any updates?
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![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(105.60000000000001, 86%, 20%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EHV%3C/text%3E%3C/svg%3E)
Harry Vo (WICLOUD CORPORATION) 3,505 Reputation points Microsoft External Staff Moderator2025-12-02T07:27:16.7+00:00 Hi @Lucas Cordeiro , do you have any update?
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