Was this page helpful?
Your feedback about this content is important. Let us know what you think.
Additional feedback?
1500 characters remaining
UnknownMessageReceived Event
Collapse the table of content
Expand the table of content

ServiceHostBase.UnknownMessageReceived Event

Occurs when an unknown message is received.

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

public event EventHandler<UnknownMessageReceivedEventArgs> UnknownMessageReceived

Caution noteCaution

When using WorkflowServiceHost, exposing a hosting endpoint, and a UnknownMessageReceived exception is thrown, the host passes the message to the event handler. If an attempt is made to read this message an InvalidOperationException is thrown. The description of the exception will say “This message cannot support the operation because it has been read.” The WCF infrastructure reads the message while extracting the message parameters. This message is then passed to the event handler and any attempt to read it causes an exception. If you need to access message parameters in your InvalidOperationException handler from a hosting endpoint, define the hosting endpoint contract using MessageContract and place the needed data into a message header. For more information about hosting endpoints see Workflow Service Host Extensibility

.NET Framework

Supported in: 4.6, 4.5, 4, 3.5, 3.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1
© 2015 Microsoft