WCF多服务配置失败

问题

首先来看一下项目结构

如图中所示,我需要在App.config文件中配置两个服务：IBookSerivices和IWcfSvrCallBack

配置的结果如下面的XML

代码

<services>
<service behaviorConfiguration="services_first.Service1Behavior"
name="services_first.BookServices">
<endpoint address="" binding="wsHttpBinding" contract="services_first.IBookservices">
<identity>
<dns value="localhost" />
identity>
endpoint>
<endpoint address="mex" binding="mexHttpBinding" contract="IMetadataExchange" />
<host>
<baseAddresses>
<add baseAddress="http://localhost:8731/Design_Time_Addresses/services_first/Service1/" />
baseAddresses>
host>
service>


<service behaviorConfiguration="services_first.Service1Behavior"
name="services_first.WCFSvrCallBack">
<endpoint binding="wsHttpBinding" bindingConfiguration="" contract="services_first.IWCFSvrCallUser" />
<host>
<baseAddresses>
<add baseAddress="http://localhost:8731/Design_Time_Addresses/services_first/Service1/" />
baseAddresses>
host>
service>
services>
<behaviors>

我在谳试启动新实例时出现以下错误：

System.InvalidOperationException: 协定需要双工，但是绑定“WSHttpBinding”不支持它或者因配置不正确而无法支持它。

是哪儿配置错了呢？请指点，谢谢啊！

最佳回答

将配置：  
                     
                         
                     
                 
中的wsHttpBinding改成wsDualHttpBinding。

试试