说明：  这是一遍关于数据通信的论文，是基于c/s结构的一个简单的小邮箱的开发实例，用到了c#和简单的pop和smtp协议，大家可以参考一下
(This is again on the data communications paper is based on the c/s the structure of a simple example of the development of small-mail, use the c# And simple pop and smtp agreement, we can refer to)