System.Transactions.TransactionInterop.GetTransactionFromTransmitterPropagationToken C# (CSharp) Method

        public static Transaction GetTransactionFromTransmitterPropagationToken(byte[] propagationToken)
        {
            if (null == propagationToken)
            {
                throw new ArgumentNullException(nameof(propagationToken));
            }

            if (propagationToken.Length < 24)
            {
                throw new ArgumentException(SR.InvalidArgument, nameof(propagationToken));
            }

            TransactionsEtwProvider etwLog = TransactionsEtwProvider.Log;
            if (etwLog.IsEnabled())
            {
                etwLog.MethodEnter(TraceSourceType.TraceSourceDistributed, "TransactionInterop.GetTransactionFromTransmitterPropagationToken");
            }

            // Extract the transaction guid from the propagation token to see if we already have a
            // transaction object for the transaction.
            byte[] guidByteArray = new byte[16];
            for (int i = 0; i < guidByteArray.Length; i++)
            {
                // In a propagation token, the transaction guid is preceeded by two version DWORDs.
                guidByteArray[i] = propagationToken[i + 8];
            }

            var txId = new Guid(guidByteArray);

            // First check to see if there is a promoted LTM transaction with the same ID.  If there is, just return that.
            Transaction tx = TransactionManager.FindPromotedTransaction(txId);
            if (null != tx)
            {
                if (etwLog.IsEnabled())
                {
                    etwLog.MethodExit(TraceSourceType.TraceSourceDistributed, "TransactionInterop.GetTransactionFromTransmitterPropagationToken");
                }

                return tx;
            }

            DistributedTransaction dTx = GetDistributedTransactionFromTransmitterPropagationToken(propagationToken);

            // If a transaction is found then FindOrCreate will Dispose the distributed transaction created.
            Transaction returnValue = TransactionManager.FindOrCreatePromotedTransaction(txId, dTx);

            if (etwLog.IsEnabled())
            {
                etwLog.MethodExit(TraceSourceType.TraceSourceDistributed, "TransactionInterop.GetTransactionFromTransmitterPropagationToken");
            }
            return returnValue;
        }