private void detach_EventTypeAssociations_MasterId(EventTypeAssociation entity)
 {
     this.SendPropertyChanging("EventTypeAssociations_MasterId");
     entity.EventType_MasterId = null;
 }
 private void attach_EventTypeAssociations_EventTypeId(EventTypeAssociation entity)
 {
     this.SendPropertyChanging("EventTypeAssociations_EventTypeId");
     entity.EventType_EventTypeId = this;
 }