Question

This is my service:

InstanceContextMode = InstanceContextMode.Single,
ConcurrencyMode = ConcurrencyMode.Multiple

I have one method that returns an ID by searching something at the service computer. This method can’t be act like ConcurrencyMode.Multiple. What do I do?

Answer 1

If I understand your question correctly, you want a service that uses ConcurrencyMode = ConcurrencyMode.Multiple but you also want a method that is single threaded.

Just use locking in the service method

private object getIdLock = new object();
public int GetId()
{
    lock(getIdLock)
    {
        // do your stuff in here
    }
}