public static object SubscribeOnce(this object instance, string eventName, Delegate handler, out EventSubscription subscription)
{
object result = instance.UnSubscribe(eventName, handler).Subscribe(eventName, handler);
subscription = instance.GetEventSubscriptions(eventName).FirstOrDefault(es => es.Delegate.Equals(handler));
return(result);
}
public static object SubscribeOnce(this object instance, string eventName, EventHandler handler, out EventSubscription subscription)
{
return(SubscribeOnce(instance, eventName, (Delegate)handler, out subscription));
}