用c#实现能过socket连接smtp实现发送邮件及附件的小程序，通常可用来定时通知什么的-with c # socket connections will be a realization smtp mail attachments and small programs, usually can be used to regularly informed of what

用c语言实现的pop3程序，老师上课的范例，对编程技巧很有帮助，写得很经典！-Pop3 using c language of the program, an example of class the teacher, very helpful on the programming skills to write a very classic!