private Task SaveExposureDataAsync(IList <DailySummary> dailySummaryList, IList <ExposureWindow> exposureWindowList) { _loggerService.StartMethod(); string dailySummaryListJson = JsonConvert.SerializeObject(dailySummaryList); string exposureWindowListJson = JsonConvert.SerializeObject(exposureWindowList); try { _secureStorageService.SetStringValue(PreferenceKey.DailySummaries, dailySummaryListJson); _secureStorageService.SetStringValue(PreferenceKey.ExposureWindows, exposureWindowListJson); return(Task.CompletedTask); } finally { _loggerService.EndMethod(); } }