echo的客户程序，很有用的调试工具，实现tcp和udp协议的客户端，下程序为tcp-echo client program, a very useful debugging tool, tcp and udp protocol client, under the procedures for tcp

基于c#的，tcp的聊天，简单的，能够聊天，适合初学者学习，可以下载来- Based on the c#, tcp chat, simply can chat, suitable for beginners to learn, you can download to see C# udp-based chat tool

一个强大的网络通信调试工具，强烈推荐下载看看，很适合学习，功能也很强大。(A powerful network communication debugging tool, strongly recommended download look, very suitable for learning, also powerful.)