[ServiceContract]     //定义服务契约   需要引用System.ServiceModel

    public interface ICalculator

    {

        [OperationContract]   //定义消息契约

        double Add(double x, double y);

        [OperationContract]

        double Subtract(double x, double y);

        [OperationContract]

        double Multiply(double x, double y);

        [OperationContract]

        double Divide(double x, double y);

    }

public class CalculatorService:ICalculator   //继承服务契约

    {

        public double Add(double x, double y)

        {

            return x + y;

        }

        public double Subtract(double x, double y)

        {

            return x - y;

        }

        public double Multiply(double x, double y)

        {

            return x * y;

        }

        public double Divide(double x, double y)

        {

            return x / y;

        }

    }

static void Main(string[] args)

        {

            using (ServiceHost host = new ServiceHost(typeof(CalculatorService))) // 承载服务

            {

                host.AddServiceEndpoint(typeof(ICalculator), new WSHttpBinding(), "http://localhost:3721/CalculatorService");  // 增加节点到承载服务，参数是：契约、绑定、地址

                if (host.Description.Behaviors.Find<ServiceMetadataBehavior>() == null)

                {

                    ServiceMetadataBehavior behavior = new ServiceMetadataBehavior();     //定义服务行为

                    behavior.HttpGetEnabled = true;             //是否发布服务元数据，方便使用GET-HTTP进行检索

                    behavior.HttpGetUrl = new Uri("http://localhost:3721/CalculatorService/metadata");  //获取或设置元数据的发布地址

                    host.Description.Behaviors.Add(behavior);   //添加服务行为到承载服务

                }

                host.Opened += delegate

                {

                    Console.WriteLine("服务已经开启，按任意键终止");

                };

                host.Open();

                Console.Read();

            }

        }

<configuration>

  <system.serviceModel>

    <behaviors>

      <serviceBehaviors>

        <behavior name="metadataBehavior">

          <serviceMetadata httpGetEnabled="true" httpGetUrl="http://127.0.0.1:3722/CalculatorService/metadata"/>

        </behavior>

      </serviceBehaviors>

    </behaviors>

    <services>

      <service name="Service.CalculatorService" behaviorConfiguration="metadataBehavior">

        <endpoint address="http://127.0.0.1:3722/CalculatorService" binding="wsHttpBinding"

            bindingConfiguration="" name="Test" contract="Service.Interface.ICalculator" />

      </service>

    </services>

  </system.serviceModel>

</configuration>

static void Main(string[] args)

        {

            using (ServiceHost host = new ServiceHost(typeof(CalculatorService))) // 承载服务

            {

                host.Opened += delegate

                {

                    Console.WriteLine("服务已经开启，按任意键终止");

                };

                host.Open();

                Console.Read();

            }

        }

static void Main(string[] args)

        {

            //客户端调用，不通过代理类，通过ChannelFactory直接创建服务代理对象

            //条件：需要引用契约动态库

            using (ChannelFactory<ICalculator> channelFactory = new ChannelFactory<ICalculator>(new WSHttpBinding(), "http://127.0.0.1:3722/CalculatorService"))

            {

                ICalculator calcuator = channelFactory.CreateChannel();  //创建服务代理对象

                Console.WriteLine("5+5={0}", calcuator.Add(, ));

                Console.WriteLine("5-5={0}", calcuator.Subtract(, ));

                Console.WriteLine("5*5={0}", calcuator.Multiply(, ));

                Console.WriteLine("5/5={0}", calcuator.Divide(, ));

            }

            Console.Read();

        }