SIPSorcery.SIP.SIPTransaction.FireTransactionStateChangedEvent C# (CSharp) Method

        private void FireTransactionStateChangedEvent()
        {
            FireTransactionTraceMessage("Transaction state changed to " + this.TransactionState + ".");

            if (TransactionStateChanged != null)
            {
                try
                {
                    TransactionStateChanged(this);
                }
                catch (Exception excp)
                {
                    logger.Error("Exception FireTransactionStateChangedEvent. " + excp.Message);
                }
            }
        }