public static void Main(string[] args)
{
EndpointAddress address = new EndpointAddress("http://localhost/ProviderService/Wcf/WCF_DEMO.svc");
BasicHttpBinding binding = new BasicHttpBinding();
ChannelFactory <IDemo> factory = new ChannelFactory <IDemo>(binding, address);
IDemo channel = factory.CreateChannel();
string result = channel.Echo("Tony");
Console.WriteLine(result);
Console.ReadLine();
}