wcf - Using an Attribute (IOperationBehavior) on all service methods -

i using following [trackingbehaviorattribute] custom ioperationinvoker on [operationcontract] , fine.

but seek way able add attribute on interface level ([servicecontract] level). want avoid manual process of adding attribute on every method inside service.

using system.reflection; using system.servicemodel; using system.servicemodel.description; using system.servicemodel.dispatcher; using system.servicemodel.channels;      public class trackingbehaviorattribute : attribute, ioperationbehavior     {         #region ioperationbehavior members         public void addbindingparameters(operationdescription operationdescription,                                          bindingparametercollection bindingparameters)         {         }          public void applyclientbehavior(operationdescription operationdescription,                                         clientoperation clientoperation)         {         }          public void validate(operationdescription operationdescription)         {         }          public void applydispatchbehavior(operationdescription operationdescription,                                           dispatchoperation dispatchoperation)         {             methodinfo currmethodinfo = operationdescription.syncmethod;             customoperationinvoker invoker = new customoperationinvoker                                           (dispatchoperation.invoker, currmethodinfo);              dispatchoperation.invoker = invoker;             invoker.oninvokeended += new eventhandler<trackingeventargs>(/* logwritermethod! */);         }         #endregion     } } 

i have tried modify attribute include iservicebehavior follows:

public class trackingbehaviorattribute : attribute, iservicebehavior, ioperationbehavior {     #region iservicebehavior members     public void addbindingparameters(servicedescription servicedescription, servicehostbase servicehostbase, system.collections.objectmodel.collection<serviceendpoint> endpoints, bindingparametercollection bindingparameters)     {      }     public void applydispatchbehavior(servicedescription servicedescription, servicehostbase servicehostbase)     {         foreach ()         {             //some loop add attribute service operation.         }     }     public void validate(servicedescription servicedescription, servicehostbase servicehostbase)     {     }      #endregion 

but cant seem work. approaching wrong?

update

i have of @erniel got attribute work on service-level when applied multiple services following error when starting host:

"the value not added collection, collection contains item of same type: 'tracking.trackingservicebehaviorattribute'. collection supports 1 instance of each type." 

how work around this?

the loop looking this:

public virtual void applydispatchbehavior(servicedescription servicedescription, servicehostbase servicehostbase) {     foreach (serviceendpoint endpoint in servicedescription.endpoints)     {         foreach (operationdescription operation in endpoint.contract.operations)         {             // trackingbehaviorattribute code implements ioperationbehavior             operation.behaviors.add(new trackingbehaviorattribute());         }     } } 

if need more examples carlos figueira extensibility blog place read.