You should derive from the BindingElementExtensionElement class to use a custom BindingElement implementation from a machine or application configuration file.

Once a BindingElementExtensionElement instance has been created, a custom binding element is returned. You can use this in an application configuration file by using the <add> element and setting the type attribute to the BindingElementExtensionElement class, and the name attribute to the custom binding element.

System..::.Object
  System.Configuration..::.ConfigurationElement
    System.ServiceModel.Configuration..::.ServiceModelExtensionElement
      System.ServiceModel.Configuration..::.BindingElementExtensionElement
        System.ServiceModel.Configuration..::.BinaryMessageEncodingElement
        System.ServiceModel.Configuration..::.CompositeDuplexElement
        System.ServiceModel.Configuration..::.ContextBindingElementExtensionElement
        System.ServiceModel.Configuration..::.MtomMessageEncodingElement
        System.ServiceModel.Configuration..::.OneWayElement
        System.ServiceModel.Configuration..::.PeerTransportElement
        System.ServiceModel.Configuration..::.PnrpPeerResolverElement
        System.ServiceModel.Configuration..::.PrivacyNoticeElement
        System.ServiceModel.Configuration..::.ReliableSessionElement
        System.ServiceModel.Configuration..::.SecurityElementBase
        System.ServiceModel.Configuration..::.SslStreamSecurityElement
        System.ServiceModel.Configuration..::.TextMessageEncodingElement
        System.ServiceModel.Configuration..::.TransactionFlowElement
        System.ServiceModel.Configuration..::.TransportElement
        System.ServiceModel.Configuration..::.UseManagedPresentationElement
        System.ServiceModel.Configuration..::.WebMessageEncodingElement
        System.ServiceModel.Configuration..::.WindowsStreamSecurityElement

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

Reference