装载list的时候 一定要把每一个实体放到for里面

            for (int i = 0; i < lines.Length; i++)
            {
                QQEntity qqEntity = new QQEntity();
                qqEntity.Name = lines[i].Split(',')[0];
                qqEntity.Id = i;
                qqEntity.Password = lines[i].Split(',')[1];
                qqList.Add(qqEntity);
            }