How to set the broadcast option for the OpSetProperties to "on"
How to set the broadcast settings for the OpSetProperties to true so that the EventCode.PropertiesChanged is being called?
OpSetProperties always broadcasts unconditionally. What are you trying to do? If you want to handle these updates, register method as LoadBalancingClient.OnEventAction or override LoadBalancingClient.OnEvent (do not forget to call base method in latter case)