public static void Start()
{
_server = new Server
{
Services = { SchoolService.BindService(new MsgServiceImpl()) },
Ports = { new ServerPort("localhost", 40001, ServerCredentials.Insecure) }
};
_server.Start();
Console.WriteLine("grpc ServerListening On Port 40001");
Console.WriteLine("任意键退出...");
Console.ReadKey();
_server?.ShutdownAsync().Wait();
}