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Umbraco-CMS/src/Umbraco.Core/Extensions/LanguageServiceExtensions.cs

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using Umbraco.Cms.Core.Services;
namespace Umbraco.Cms.Core.Extensions;
/// <summary>
/// Provides extension methods for <see cref="ILanguageService"/>.
/// </summary>
public static class LanguageServiceExtensions
{
/// <summary>
/// Retrieves all ISO codes of all languages.
/// </summary>
/// <param name="service">The <see cref="ILanguageService"/>.</param>
/// <returns>A collection of language ISO codes.</returns>
public static async Task<IEnumerable<string>> GetAllIsoCodesAsync(this ILanguageService service) => (await service.GetAllAsync()).Select(x => x.IsoCode);
}