System.Net.Mail.SmtpConnection.ConnectAndHandshakeAsyncResult.ConnectionCreatedCallback C# (CSharp) Method

            private static void ConnectionCreatedCallback(object request, object state)
            {
                if (NetEventSource.IsEnabled) NetEventSource.Enter(null, request);
                ConnectAndHandshakeAsyncResult ConnectAndHandshakeAsyncResult = (ConnectAndHandshakeAsyncResult)request;
                if (state is Exception)
                {
                    ConnectAndHandshakeAsyncResult.InvokeCallback((Exception)state);
                    return;
                }

                try
                {
                    lock (ConnectAndHandshakeAsyncResult._connection)
                    {
                        //if we were cancelled while getting the connection, we should close and return
                        if (ConnectAndHandshakeAsyncResult._connection._isClosed)
                        {
                            ConnectAndHandshakeAsyncResult._connection.ReleaseConnection();
                            if (NetEventSource.IsEnabled) NetEventSource.Info(null, $"Connect was aborted: {request}");
                            ConnectAndHandshakeAsyncResult.InvokeCallback(null);
                            return;
                        }
                    }

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

                if (NetEventSource.IsEnabled) NetEventSource.Exit(null, request);
            }