.NET4.0中的WCF问题

Question

GeneralCalculatorService.svc代码：
<%@ ServiceHost Language="C#" Debug="true" Service="Services.GeneralCalculatorService" %>web.config配置：
<?xml version="1.0"?>
<configuration>
  <system.serviceModel>
    <behaviors>
      <serviceBehaviors>
        <behavior name="calculatorServiceBehavior">
          <serviceMetadata httpGetEnabled="true"/>
        </behavior>
      </serviceBehaviors>
    </behaviors>
    <services>
      <service name="Services.GeneralCalculatorService" behaviorConfiguration="calculatorServiceBehavior">
        <endpoint binding="basicHttpBinding" contract="Contracts.ServiceContract.IGeneralCalculator"/>
      </service>
    </services>
  </system.serviceModel>
  <system.web>
    <compilation targetFramework="4.0">
      <assemblies>
        <add assembly="System.ServiceModel, Version=4.0.0.0, Culture=neutral, PublicKeyToken=B77A5C561934E089"/>
      </assemblies>
    </compilation>
    <pages controlRenderingCompatibilityVersion="3.5" clientIDMode="AutoID"/>
  </system.web>
</configuration>
代码入上，在.net4.0中，运行http://localhost/WCFServices/GeneralCalculatorService.svc ，
报错：
The type 'Services.GeneralCalculatorService', provided as the Service attribute value in the ServiceHost directive, or provided in the configuration element system.serviceModel/serviceHostingEnvironment/serviceActivations could not be found.请各位指教，非常感谢！！！

Answer 1

类型'Services.GeneralCalculatorService'，因为在提供的ServiceHost指令，服务属性值或在配置元素的system.serviceModel提供/ serviceHostingEnvironment /找不到serviceActivations。

Answer 2

<service name="Services.GeneralCalculatorService" behaviorConfiguration="calculatorServiceBehavior">
        <endpoint binding="basicHttpBinding" contract="Contracts.ServiceContract.IGeneralCalculator"/>
      </service>
name="Services.GeneralCalculatorService"
没识别到这个

Answer 3

namespace Services
{
    public class GeneralCalculatorService : IGeneralCalculator
    {
        public double Add(double x, double y)
        {
            return x + y;
        }
    }
}上面是服务类定义，请高人指教，该如何做才能运行成功！！！