Does WCF perform operations on a Singleton WCF service in the same thread?

Question

I have a service that is marked with the ServiceBehavior attribute

[ServiceBehavior(InstanceContextMode=InstanceContextMode.Single,
 ConcurrencyMode = ConcurrencyMode.Multiple)]

Is it likely that operations in this service will be performed by the same thread?

I store important data in the ThreadLocal variable, which should be used to execute the operation once.

Answer 1

No,

Each request responds with a different thread. The InstanceContextMode.Single attribute indicates that the service uses the same object (and its members) for each request.

Answer 2

, WCF ThreadPool = > Thread , , . , ThreadLocal <T> ThreadStaticAttribute , .