ServiceEnvoyExtractor class

    /// <summary>
    /// Static class responsible for deserializing JSON to ServiceEnvoys.
    /// </summary>
    public static class ServiceEnvoyExtractor
    {
        private const string ApplicationUriPrefix = "ms-appx:///",
            AssetUriPrefix = ApplicationUriPrefix + "Assets/",
            DataUriPrefix = ApplicationUriPrefix + "Data/";

        private static Uri ServiceRecordsPath = new Uri(DataUriPrefix + "ServiceRecords.json");

        public async static Task<ObservableCollection<ServiceEnvoy>> ExtractServiceEnvoys()
        {
            //get string from file
            var file = await StorageFile
                .GetFileFromApplicationUriAsync(ServiceRecordsPath);
            string json = await FileIO.ReadTextAsync(file);

            var collection = new ObservableCollection<ServiceEnvoy>();

            //parse json into collection
            foreach (var value in JsonObject.Parse(json)["Services"].GetArray())
            {
                var obj = value.GetObject();
                collection.Add(new ServiceEnvoy(
                    obj["Name"].GetString(),
                    new BitmapImage(new Uri(
                        AssetUriPrefix + obj["Image"].GetString()))));
            }

            return collection;
        }
    }