一个基于Winform的QQ程序，基本实现了QQ老版本的大部分功能，已通过测试，想学习网络多线程的可以下了练练手！-A program based on Winform' s QQ, QQ old version of the basic implement most of the functionality has been tested, like learning network for multi-threaded and thought hands down!

聊天系统，用winform做的一个聊天系统-chat system Winform with a chat system