//Prototype + Singleton
public void CreateEvent(string eventName, DateTime eventDate, TimeSpan duration, string subject)
{
var eventManager = CommonEventManager.Instance;
CommonEvent _event = defaultEvent.Clone() as CommonEvent;
_event.EventName = eventName;
_event.EventDate = eventDate;
_event.Duration = duration;
_event.Subject = subject;
eventManager.AddEvent(_event);
}