This is a demo project base on .NET core WebAPI template WeatherForecast, implement Localization on Text and Enum, read i18n text from resources.

1. Add resource file(.resx)
   Usually I will put my resource file in [Resources] folder, remember put cultureInfo name on resx file like this {name}.{culture}.resx
   
2. Setup Startup.cs
   In public void ConfigureServices(IServiceCollection services) add following code

   //set Support Cultures and default
   services.Configure<RequestLocalizationOptions>(options =>
   {
       var supportedCultures = new[]{
           new CultureInfo("en-US"),
           new CultureInfo("zh-TW"),
           new CultureInfo("ja-JP")
       };
       options.DefaultRequestCulture = new RequestCulture("en-US");
       options.SupportedCultures = supportedCultures;
       options.SupportedUICultures = supportedCultures;
   });
   //set resource path
   services.AddLocalization(options => options.ResourcesPath = "Resources");

3. Setup controller
   • DI

     private readonly IStringLocalizer _localizer;
     public YourController(IStringLocalizerFactory factory)
     {
        _localizer = factory.Create("Message", System.Reflection.Assembly.GetExecutingAssembly().GetName().Name);
     }

   • Get Value
     using _localizer[{name}] to get the value from resource file, for example, _localizer["cold"] can get key name [cold]'s culture string, if can't find the key in resource, it will just output the key name "cold" as string.
     You can check WeatherForecastController.cs for more usage detail.

• Enum with i18N
  It was easy, just use _localizer[{enumName}.ToString()] to get culture string from resource, or you can check here for the usage.