//定义接口

    [ServiceContract]

    interface IGetInfo

    {

        [OperationContract]

        DateTime GetDateTime();

        [OperationContract]

        string GetName();

        #region 重载

        [OperationContract(Name = "say_name")]

        string Say(string name);

        [OperationContract(Name = "say_name_adress")]

        string Say(string name, string address);

        #endregion

    }

      //实现IGetInfo接口

    class GetInfoService : IGetInfo

    {

        public DateTime GetDateTime()

        {

            return DateTime.Now;

        }

        public string GetName()

        {

            return "张三";

        }

        public string Say(string name)

        {

            return name+"说话了";

        }

        public string Say(string name,string address)

        {

            return name+"在"+address+"说话了";

        }

    }

<!--添加的内容-->

  <system.serviceModel>

    <services>

      <service  name="WCFDEMO2.GetInfoService" behaviorConfiguration="TestBehaciors">

        <host>

          <!--基地址 baseAddress启动服务访问地址-->

          <baseAddresses>

            <add baseAddress="http://localhost:9001/GetInfo"/>

          </baseAddresses>

        </host>

        <!--终节点 binding 访问的协议 -->

        <endpoint address="" binding="basicHttpBinding" contract="WCFDEMO2.IGetInfo" ></endpoint>

      </service>

    </services>

    <!--行为可配置可不配置-->

    <behaviors>

      <serviceBehaviors>

        <behavior name="TestBehaciors">

          <!--允许访问WCF的服务-->

          <serviceMetadata httpGetEnabled="true"/>

        </behavior>

      </serviceBehaviors>

    </behaviors>

  </system.serviceModel>

 ServiceHost host = new ServiceHost(typeof( WCFDEMO2.GetInfoService));

            host.Open();