private async Task<List<string>> GetAllSiteFoldersFolders() { var listCacheKey = "folderList"; var result = cache.Get(listCacheKey) as List<string>; if (result != null) { log.LogDebug("Folder List retrieved from cache with key \"{cacheKey}\".", listCacheKey); return result; } result = await siteRepo.GetAllSiteFolders(); var cacheEntryOptions = new MemoryCacheEntryOptions() .SetAbsoluteExpiration(cachingOptions.FolderListCacheDuration); log.LogDebug("Caching folder list with keys \"{cacheKey}\".", listCacheKey); cache.Set(listCacheKey, result, cacheEntryOptions); return result; }