Yes, if you have to create a new Resource.xaml file and then add it to your Application.xaml file:
<Application.Resources> <ResourceDictionary> <ResourceDictionary.MergedDictionaries> <ResourceDictionary Source="Resources.xaml"/> </ResourceDictionary.MergedDictionaries> </ResourceDictionary> </Application.Resources>
then you should be able to reference styles in Resource.xaml from all windows of your application.
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