System.Net.WebSockets.WebSocketBase.UpdateReceiveState C# (CSharp) Метод

        private void UpdateReceiveState(int newReceiveState, int expectedReceiveState)
        {
            int receiveState;
            if ((receiveState = Interlocked.Exchange(ref _receiveState, newReceiveState)) != expectedReceiveState)
            {
                Debug.Assert(false,
                    string.Format(CultureInfo.InvariantCulture,
                        "'_receiveState' had an invalid value '{0}'. The expected value was '{1}'.",
                        receiveState,
                        expectedReceiveState));
            }
        }