Assembly: System.Transactions (in system.transactions.dll)
If the transaction is escalated to a two-phase commit transaction, this property returns its unique identifier. If the transaction is not escalated, the value is a null reference (Nothing in Visual Basic).
For more information on how a transaction's management is escalated, see Transaction Management Escalation.
Windows 98, Windows 2000 SP4, Windows Millennium Edition, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition