System.Net.Mail.SmtpConnection.EndInitializeConnection C# (CSharp) Method

        internal void EndInitializeConnection(IAsyncResult result)
        {
            _tcpClient.EndConnect(result);
            _networkStream = _tcpClient.GetStream();
        }

            private void InitializeConnection()
            {
                IAsyncResult result = _connection.BeginInitializeConnection(_host, _port, InitializeConnectionCallback, this);

                if (result.CompletedSynchronously)
                {
                    try
                    {
                        _connection.EndInitializeConnection(result);
                        if (NetEventSource.IsEnabled)
                        {
                            NetEventSource.Info(this, "Connect returned");
                        }

                        Handshake();
                    }
                    catch (Exception e)
                    {
                        InvokeCallback(e);
                    }
                }
            }