您可以将实例而不是类型传递给ServiceHost;

You can pass an instance rather than a type to ServiceHost;

MyService impl = new MyService();
ServiceHost host = new ServiceHost(impl);
host.Open();

var a = impl.GetCounter();

希望这会有所帮助，
弗雷德里克·博纳德(Fredrik Bornander)

Hope this helps,
Fredrik Bornander