public async Task SaveAsync()
        {
            var store = new IsolatedStorage <Settings>();

            if (!saving)
            {
                saving = true;
                try
                {
                    Debug.WriteLine("Saving settings to : " + SettingsFolder);
                    await store.SaveToFileAsync(SettingsFolder, SettingsFileName, this);
                }
                finally
                {
                    saving = false;
                }
            }
        }
        public static async Task <Settings> LoadAsync()
        {
            var      store  = new IsolatedStorage <Settings>();
            Settings result = null;

            try
            {
                Debug.WriteLine("Loading settings from : " + SettingsFolder);
                result = await store.LoadFromFileAsync(SettingsFolder, SettingsFileName);
            }
            catch
            {
            }
            if (result == null)
            {
                result = new Settings();
                await result.SaveAsync();
            }
            return(result);
        }