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Message.IsFirstInTransaction Property

Gets a value that indicates whether the message was the first message sent in a transaction.

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

public bool IsFirstInTransaction { get; }

Property Value

Type: System.Boolean
true if the message was the first message sent in a transaction; otherwise, false.


The message has not been sent. This property can only be read on messages retrieved from a queue.


The message queue is filtered to ignore the IsFirstInTransaction property.

Receiving applications use the IsFirstInTransaction property to verify that a message was the first message sent in a single transaction to a single queue.

This property is available only with Message Queuing version 2.0 and later.

To verify transaction boundaries, you can use the IsFirstInTransaction property along with two other properties: IsLastInTransaction and TransactionId. Use the former to check whether a message was the last message sent in the transaction, and use the latter to retrieve the identifier of the transaction.

If only one message is sent in a transaction, the IsFirstInTransaction and IsLastInTransaction properties are both set to true.

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

// Display the value of the message's IsFirstInTransaction property. 
// To view this property value, the queue's 
// MessageReadPropertyFilter.IsFirstInTransaction property must be set 
// to true before the message is received.
Console.WriteLine("Message.IsFirstInTransaction: {0}",

.NET Framework

Supported in: 4.5.2, 4.5.1, 4.5, 4, 3.5, 3.0, 2.0, 1.1, 1.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)

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

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