I have the following style added to my Windows.Resources
...
From above
Merged/BrushResources.xamlis the location of the resource file, which is located under the folder calledMerged.
Now if you are wondering what should be the declaration syntax in the outer file, check this:
If you want to make the resource available through all application (visible in all your windows) then declare in the
App.xamlresources section.