源码为基于TCP/IP协议的C#局域网通讯程序，算反结构为C/S 结构，程序下载既能运行，是初学者学习TCP的一个好的案例-Source-based TCP/IP protocol C# LAN communication program, anti-structure calculation C/S structure, download both runs for beginners to learn a good case TCP

此工程坐标反算方位角，方便用于测量工程使用。-Inverse azimuth coordinate this project, easy to use for measuring project.