用c#编写的一个“五子棋网络对战“程序。程序包括服务器端和客户端两部分， 可以实现多人同时对战。玩家交替走棋，自动判定输赢-A backgammon online play program written in c#. The program includes two parts of the server and client,  can achieve more than simultaneous multiplayer. The players altern