System.Net.Cache.SingleItemRequestCache.TryUpdate C# (CSharp) Method

        internal override bool TryUpdate(string key, DateTime expiresUtc, DateTime lastModifiedUtc, DateTime lastSynchronizedUtc, TimeSpan maxStale, StringCollection entryMetadata, StringCollection systemMetadata)
        {
            if (key == null)
                throw new ArgumentNullException("key");

            FrozenCacheEntry chkEntry = FrozenCacheEntry.Create(_Entry);

            //
            // This class does not forward metadata updates to WinInet to simplify the design and avoid interlocked ops
            //

            if (chkEntry == null || chkEntry.Key != key)
                return true;

            chkEntry.ExpiresUtc = expiresUtc;
            chkEntry.LastModifiedUtc = lastModifiedUtc;
            chkEntry.LastSynchronizedUtc = lastSynchronizedUtc;
            chkEntry.MaxStale = maxStale;
            chkEntry.EntryMetadata = entryMetadata;
            chkEntry.SystemMetadata = systemMetadata;
            _Entry = chkEntry;
            return true;
        }
        //