System.Net.CookieContainer.AddRemoveDomain C# (CSharp) Method

        private void AddRemoveDomain(string key, PathList value) {
            // Hashtable support multiple readers ans one writer
            // Synchronize writers (make them to be just one)
            lock(this) {
                if (value == null) {
                    m_domainTable.Remove(key);
                }
                else {
                    m_domainTable[key] = value;
                }
            }
        }