public class TestClient
    {
        // no need for additional methods, properties, or delegates

        // All internal state needs to be declared as protected proterties
        protected virtual Address Address { get; set; }

        // Domain behavior does not have to be virtual, nor return anything
        public void ClientMoves(Address address)
        {
            // branch
            if(address.IsOnMars)
            {
               //multiple published events
               ClientMovedToMars(address);
               ClientNoLongerLivesOnEarth(address);
            }
            else
            {
               ClientMoved(address);
            }
        }
        protected virtual ClientMovedEvent ClientMoved(Address address)
        {
           return new ClientMovedEvent(address);
        }
        protected virtual ClientNoLongerLivesOnEarthEvent ClientNoLongerLivesOnEarth(Address address)
        {
           return new ClientNoLongerLivesOnEarthEvent(address);
        }
        protected virtual ClientMovedToMarsEvent ClientMovedToMars(Address address)
        {
           return new ClientMovedToMarsEvent(address);
        }
    }