C# (CSharp) System.Collections.Concurrent.ConcurrentDictionary.FirstOrDefault Examples

Example #1

        public async Task <T> GetFromSiteIdAsync <T>(string siteId, string type)
        {
            var keyValue = Items.FirstOrDefault(s => s.Value.SiteId == siteId && s.Value.Type == type);

            var cacheItem = keyValue.Value;

            if (cacheItem == null)
            {
                var builder = Builders <CacheItem> .Filter;
                var filter  = builder.Eq(p => p.SiteId, siteId) & builder.Eq(p => p.Type, type);
                cacheItem = await _collection.Find(filter).FirstOrDefaultAsync();

                AddMemoryCache(cacheItem);
            }
            else
            {
                return(JsonConvert.DeserializeObject <T>(cacheItem.Value));
            }

            return(default(T));
        }