private static IEnumerable <MockLanguage> ReadFromJson(IServiceProvider serviceProvider) { var optionsAccessor = serviceProvider .GetRequiredService <IDataProviderOptions <IEnumerable <MockLanguage>, FileProviderOptions> >(); var file = new PhysicalFileProvider(AppContext.BaseDirectory).GetFileInfo(optionsAccessor.Value.Path); return(JsonSerializer.DeserializeAsync <IEnumerable <MockLanguage> >(file.CreateReadStream()).Result); }