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IExtension(Of T) Interface

Enables an object to extend another object through aggregation.

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

'Declaration
Public Interface IExtension(Of T As {Object, IExtensibleObject(Of T)})

Type Parameters

T

The object that participates in the custom behavior.

The IExtension(Of T) type exposes the following members.

  NameDescription
Public methodSupported by Portable Class LibrarySupported in .NET for Windows Store appsAttachEnables an extension object to find out when it has been aggregated. Called when the extension is added to the IExtensibleObject(Of T).Extensions property.
Public methodSupported by Portable Class LibrarySupported in .NET for Windows Store appsDetachEnables an object to find out when it is no longer aggregated. Called when an extension is removed from the IExtensibleObject(Of T).Extensions property.
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WCF allows you to extend System.ServiceModel.IExtensibleObject(Of T) objects (the System.ServiceModel.IContextChannel, System.ServiceModel.ServiceHost, System.ServiceModel.InstanceContext, and System.ServiceModel.OperationContext classes) by adding a new state or behavior by using its extensible object pattern. The extensible object pattern is used in WCF to either extend existing run-time classes with new functionality or to add new state features to an object.

.NET Framework

Supported in: 4.5, 4, 3.5, 3.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Portable Class Library

Supported in: Portable Class Library

.NET for Windows Store apps

Supported in: Windows 8

.NET for Windows Phone apps

Supported in: Windows Phone 8.1, Windows Phone Silverlight 8.1, Windows Phone Silverlight 8

Windows Phone 8.1, Windows Phone 8, 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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