System.Net.Sockets.Socket.DoBeginAccept C# (CSharp) Method

        private void DoBeginAccept(Socket acceptSocket, int receiveSize, AcceptOverlappedAsyncResult asyncResult)
        {
            if (_rightEndPoint == null)
            {
                throw new InvalidOperationException(SR.net_sockets_mustbind);
            }

            if (!_isListening)
            {
                throw new InvalidOperationException(SR.net_sockets_mustlisten);
            }

            SafeCloseSocket acceptHandle;
            asyncResult.AcceptSocket = GetOrCreateAcceptSocket(acceptSocket, false, nameof(acceptSocket), out acceptHandle);

            if (NetEventSource.IsEnabled) NetEventSource.Info(this, $"AcceptSocket:{acceptSocket}");

            int socketAddressSize = _rightEndPoint.Serialize().Size;
            SocketError errorCode = SocketPal.AcceptAsync(this, _handle, acceptHandle, receiveSize, socketAddressSize, asyncResult);

            errorCode = asyncResult.CheckAsyncCallOverlappedResult(errorCode);

            if (NetEventSource.IsEnabled) NetEventSource.Info(this, $"Interop.Winsock.AcceptEx returns:{errorCode} {asyncResult}");

            // Throw an appropriate SocketException if the native call fails synchronously.
            if (errorCode != SocketError.Success)
            {
                SocketException socketException = new SocketException((int)errorCode);
                UpdateStatusAfterSocketError(socketException);
                if (NetEventSource.IsEnabled) NetEventSource.Error(this, socketException);
                throw socketException;
            }
        }