Caching.FIFOCache.Remove C# (CSharp) Метод

        public bool Remove(string key)
        {
            if (String.IsNullOrEmpty(key)) throw new ArgumentNullException(nameof(key));

            lock (CacheLock)
            {
                List<Tuple<string, object, DateTime>> dupes = new List<Tuple<string, object, DateTime>>();

                if (Cache.Count > 0) dupes = Cache.Where(x => x.Item1.ToLower() == key).ToList();
                else dupes = null;

                if (dupes == null) return true;
                else if (dupes.Count < 1) return true;
                else
                {
                    foreach (Tuple<string, object, DateTime> curr in dupes)
                    {
                        Cache.Remove(curr);
                    }

                    return true;
                }
            }
        }