Versionr.LocalDB.UpdateFileTime C# (CSharp) Method

        internal void UpdateFileTime(string canonicalName, LocalState.FileTimestamp ft, bool? present)
        {
            lock (this)
            {
                LocalState.FileTimestamp prior = null;
                if (!present.HasValue || present.Value == true)
                    prior = Find<LocalState.FileTimestamp>(x => x.CanonicalName == canonicalName);
                if (prior == null)
                {
                    prior = new FileTimestamp() { CanonicalName = canonicalName, LastSeenTime = ft.LastSeenTime, DataIdentifier = ft.DataIdentifier };
                    Insert(prior);
                }
                else
                {
                    prior.LastSeenTime = ft.LastSeenTime;
                    prior.DataIdentifier = ft.DataIdentifier;
                    Update(prior);
                }
            }
        }