MovieService.cs

public class MovieSerivce : IMovieService
{
    private readonly IAppPolicyCache _runtimeCache;
    private const string MOVIES_CACHE_KEY = "Movies.API.Cache";

    public MovieSerivce(AppCaches appCaches)
    {
        _runtimeCache = appCaches.RuntimeCache;
    }

    public IEnumerable<Movie> GetAllMovies()
    {
        IEnumerable<Movie> movies = _runtimeCache.GetCacheItem(MOVIES_CACHE_KEY, () =>
        {
            IEnumerable<Movie> movieList = default;

            using (HttpClient httpClient = new HttpClient())
            {
                httpClient.BaseAddress = new Uri(MOVIE_BASE_URL);
                HttpResponseMessage response = httpClient.GetAsync(API_ENDPOINT).Result;
                if (response.IsSuccessStatusCode)
                {
                    var result = response.Content.ReadAsStringAsync().Result;
                    movieList = JsonConvert.DeserializeObject<IEnumerable<Movie>>(result);
                }
            }

            return movieList;

        }, TimeSpan.FromMinutes(30), false);

        return movies;
    }
}