public void DeleteRoom_beforEvent()
{
bool raisEvent = false;
_gameCity_ticket_0.BeforDeleteRoomHandler += delegate { raisEvent = true; };
_gameCity_ticket_0.AddRoom(_room);
int preCount = _gameCity_ticket_0.Rooms.Count;
_gameCity_ticket_0.RemoveRoom(_room);
Assert.True(raisEvent, "删除房间前事件");
Assert.DoesNotContain <IRoom>(_room, _gameCity_ticket_0.Rooms);
Assert.True(_gameCity_ticket_0.Rooms.Count - preCount == -1, "房间数量未减少1");
}