Gets or sets a value that specifies whether messages sent with this binding have exactly-once assurances.
Assembly: System.ServiceModel (in System.ServiceModel.dll)
ExactlyOnce, when set to true, indicates that Message Queuing (also known as MSMQ) ensures that a sent message is delivered to the receiving message queue once and only once. If delivery fails, the message is sent to the dead-letter queue depending on the DeadLetterQueue property setting. Setting ExactlyOnce to true requires the queue to be transactional.
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.