System.Net.Security.SslState.CheckEnqueueHandshakeRead C# (CSharp) Method

        private bool CheckEnqueueHandshakeRead(ref byte[] buffer, AsyncProtocolRequest request)
        {
            LazyAsyncResult lazyResult = null;
            lock (this)
            {
                if (_lockReadState == LockPendingRead)
                {
                    return false;
                }

                int lockState = Interlocked.Exchange(ref _lockReadState, LockHandshake);
                if (lockState != LockRead)
                {
                    return false;
                }

                if (request != null)
                {
                    _queuedReadStateRequest = request;
                    return true;
                }

                lazyResult = new LazyAsyncResult(null, null, /*must be */ null);
                _queuedReadStateRequest = lazyResult;
            }

            // Need to exit from lock before waiting.
            lazyResult.InternalWaitForCompletion();
            buffer = (byte[])lazyResult.Result;
            return false;
        }