包含三个类，TCPServer.cs 这个类是TCP服务端，TCPClient.cs这个类是TCP客户端，TCPServerClient.cs 这个类是服务端连接的客户端对象，自带握手校验功能，异常连接在指定时间内被关闭(Contains three classes, the TCPServer.cs class is a TCP server, the TCPClient.cs class is a TCP client, the TCPServerClient.cs class is connected with client server object, handshake checking function, abnormal connection is closed within a specified period of time)