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MessageQueue.Transactional Property

Gets a value that indicates whether the queue accepts only transactions.

Namespace: System.Messaging
Assembly: System.Messaging (in system.messaging.dll)

public bool Transactional { get; }
/** @property */
public boolean get_Transactional ()

public function get Transactional () : boolean

Property Value

true if the queue accepts only messages sent as part of a transaction; otherwise, false.

Exception typeCondition


An error occurred when accessing a Message Queuing method.

Transactional messaging refers to the coupling of several related messages into a single transaction. Sending messages as part of a transaction ensures that the messages are delivered in order, delivered only once, and successfully retrieved from their destination queue.

If a queue is transactional, it accepts only messages that are sent as part of a transaction. However, a non-transactional message can be sent or received from a local transaction queue without explicitly using transactional Begin, Commit, and Abort syntax. If a non-transactional message is sent to a transactional queue, this component creates a single-message transaction for it, except in the case of referencing a queue on a remote computer using a direct format name. In this situation, if you do not specify a transaction context when sending a message, one is not created for you and the message will be sent to the dead-letter queue.

If you send a non-transactional message to a transactional queue, you will not be able to roll back the message in the event of an exception.

MessageQueueTransaction is threading apartment aware, so if your apartment state is STA, you cannot use the transaction in multiple threads. Visual Basic sets the state of the main thread to STA, so you must apply the MTAThreadAttribute in the Main subroutine. Otherwise, sending a transactional message using another thread throws a MessageQueueException exception. You apply the MTAThreadAttribute by using the following fragment.

 public sub Main()

The following table shows whether this property is available in various Workgroup modes.

Workgroup mode


Local computer


Local computer and direct format name


Remote computer


Remote computer and direct format name


The following code example displays the value of a message queue's Transactional property.

// Display the value of the queue's Transactional property.
Console.WriteLine("MessageQueue.Transactional: {0}",

// Display the value of the queue's Transactional property.
Console.WriteLine("MessageQueue.Transactional: {0}", 

  • Full trust for the immediate caller. This member cannot be used by partially trusted code. For more information, see .

Windows 98, Windows 2000 SP4, Windows CE, Windows Millennium Edition, Windows Mobile for Pocket PC, Windows Mobile for Smartphone, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see System Requirements.

.NET Framework

Supported in: 2.0, 1.1, 1.0

.NET Compact Framework

Supported in: 2.0