You can use a ServiceHostFactory
to do that. With it, you can get access to the OM prior to the service being opened.
This is an example:
public class MyFactory : ServiceHostFactory
{
protected override ServiceHost CreateServiceHost(Type serviceType, Uri[] baseAddresses)
{
ServiceHost host = base.CreateServiceHost(serviceType, baseAddresses);
foreach (var ep in host.Description.Endpoints)
{
foreach (OperationDescription od in ep.Contract.Operations)
{
od.Behaviors.Add(new MyOperationBehavior());
}
}
return host;
}
}
And you can get more information about service host factories at http://blogs.msdn.com/b/carlosfigueira/archive/2011/06/14/wcf-extensibility-servicehostfactory.aspx