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ClientOperation Class

Used to modify or extend the execution behavior of a specific contract operation in a client object or client channel object. This class cannot be inherited.

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

public sealed class ClientOperation

The ClientOperation class is the location for client run-time modifications and insertion point for custom extensions that are scoped to only one service operation. (To modify client run-time behavior for all messages in a contract, use the ClientRuntime class.)

Install ClientOperation modifications using a custom client behavior object, either of type IContractBehavior (to find a particular operation to modify) or of type IOperationBehavior (which can then be applied by creating a custom attribute).

Use the Operations property to locate the ClientOperation object that represents a particular service operation.

For more information about clients and the client architecture, see Consuming Services Using a Client and Client Architecture. For more information about customizing the client runtime, see Extending Clients. For more information about using behaviors, see Attaching Extensions Using Behaviors.

The following properties enable you to insert custom objects or modify the client execution behavior:

  • Use the Formatter property to insert a custom IClientMessageFormatter implementation for an operation or modify the current formatter.

  • Use the ParameterInspectors property to insert a custom IParameterInspector implementation or to modify the current one.

  • Use the SerializeRequest property to control who serializes an outbound message.

  • Use the DeserializeReply property to control who deserializes an inbound message.

  • Use the Action property to access the WS-Addressing action of the request message and the ReplyAction property to access the response message action.

  • Use the BeginMethod and EndMethod to specify which client methods are associated with an asynchronous operation.

  • Use the FaultContractInfos property to get a collection of specified types that can appear in SOAP faults as the detail type.

  • Use the IsInitiating and IsTerminating properties to control whether a session is initiated or is torn down, respectively, when the operation is called.

  • Use the IsOneWay property to control whether the client waits for a response before completing the invocation.

  • Use the Parent property to obtain the containing ClientRuntime object.

  • Use the Name property to get the name of the operation.

  • Use the SyncMethod property to control which method is mapped to the operation.

The following code example shows an System.ServiceModel.Description.IEndpointBehavior inserting a custom parameter inspector into each ClientOperation in the ClientRuntime.Operations property.

#region IEndpointBehavior Members
public void AddBindingParameters(
  ServiceEndpoint endpoint, BindingParameterCollection bindingParameters
) { return; }

public void ApplyClientBehavior(ServiceEndpoint endpoint, ClientRuntime clientRuntime)
  clientRuntime.MessageInspectors.Add(new Inspector());
  foreach (ClientOperation op in clientRuntime.Operations)
    op.ParameterInspectors.Add(new Inspector());

public void ApplyDispatchBehavior(ServiceEndpoint endpoint, EndpointDispatcher endpointDispatcher)
  endpointDispatcher.DispatchRuntime.MessageInspectors.Add(new Inspector());
  foreach (DispatchOperation op in endpointDispatcher.DispatchRuntime.Operations)
    op.ParameterInspectors.Add(new Inspector());

public void Validate(ServiceEndpoint endpoint){ return; }


Any public static (Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.

Windows 7, Windows Vista, Windows XP SP2, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003

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

.NET Framework

Supported in: 3.5, 3.0