/// <summary>
/// remove event handler for event
/// </summary>
/// <typeparam name="TEvent">TEvent</typeparam>
/// <typeparam name="TEventHandler">TEventHandler</typeparam>
/// <returns>whether the operation success</returns>
public static Task <bool> UnSubscribeAsync <TEvent, TEventHandler>(this IEventSubscriber subscriber)
where TEventHandler : class, IEventHandler <TEvent>
where TEvent : class, IEventBase
{
return(subscriber.UnSubscribeAsync(typeof(TEvent), typeof(TEventHandler)));
}
