Exception System.IO.NotFound to access resx files in Xamarin Forms

Good afternoon. I'm having a problem accessing defined values in resx files from shared code in Xamarin Forms. No failure to compile, but upon execution I get an exception of type File.IO.NotFound, as if the resource file did not exist inside the mobile device (either in the emulator or on a physical device. To access the value inside the resource file, I use the following static method: Resources.Colors.ColorPrimary. Actions that have already been taken: Compile action change to Copy Always, resource class changed to public. ps: The files are generated in the bin \ debug directory