Aspnetcore.docs: Namespaces matter

[Xerillio]

I think it's important to point out that the namespaces for the classes used by the localizer matters a lot in locating the resources. Specifically in the sample repo. the SharedResources class is located at:
./sample/Localization/Resources/SharedResource.cs
Its namespace is just namespace Localization, however this is not the default namespace when you create the file on that path in Visual studio where you get namespace Localization.Resources. I had a hard time getting this to work until I stumbled upon this comment and decided to look into why that in-fact solved the problem.

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• ID: d1833676-ff1b-c587-cc9c-81afffa8ef68
• Version Independent ID: ad989395-3f49-4d55-521e-cf6fe56281ee
• Content: Globalization and localization in ASP.NET Core
• Content Source: aspnetcore/fundamentals/localization.md
• Product: aspnet-core
• GitHub Login: @Rick-Anderson
• Microsoft Alias: riande

[Rick-Anderson]

@Xerillio thanks for pointing that out. You are correct. I thought I mentioned that. I hope to review this soon.

[dunlapm]

It should also be noted that if your assembly name is not the same as your default namespace, the resources will also fail to load.

[Rick-Anderson]

@hishamco please review.

[hishamco]

RootNamespaceAttribute came for the rescue, FYI this will be mentioned in the troubleshoot article

[Rick-Anderson]

@ryanbrandenburg please make a PR with the initial draft addressing this. I can clean up and merge.

[hishamco]

@Rick-Anderson I'm already addressing this in the troubleshooting section

[ryanbrandenburg]

Yeah, this is already covered here. Closing.