.NET Web服务是否实例化每个方法调用？

I'm trying out web services for an idea I've had. Running in debug it looks like the web service class instantiates each time a client calls a method in the web service. I can see this by seeing that the constructor gets called each time I call a method. I only instantiate the proxy web service once in the client.I'm trying out web services for an idea I've ha