This example implements different kinds of behaviors like EndpointBehavior, ContractBehavior and OperationBehavior. Additionally it shows how to manipulate messages in a custom inspector and how to implement custom BodyWriter to utilize serialization of messages.
Last, but not least it shows an example of custom implementation of IWsdlExportExtension and IPolicyExportExtension and corresponding IPolicyImportExtension, IWsdlImportExtension.