1.第一种情况

百度上找到了这篇文章  http://blog.sina.com.cn/s/blog_6b44b2ba01016j0z.html

讲的是使用了using用完之后就释放了,得到启发，仔细检查了Host的代码

对比了Learning WCF第一章中的示例代码，发现用try finally来执行的

在finally中将服务关闭了

try

{

//打开服务的代码

//有2个Service打开

}

 finally

            {

                CloseHost(hostA);

                CloseHost(hostB);

            }

2.第二种情况

因为之前电脑崩溃过一次,导致本机的net.tcp服务没有激活

http://*.com/questions/22562596/unable-to-access-wcf-service-using-net-tcp-binding

Finally with the help of this link: http://rohitguptablog.wordpress.com/2011/06/16/configuring-wcf-service-with-nettcpbinding/, I figured out what was going wrong. Actually I missed the third step in above link. The Net.Tcp services were not running.

====2015年09月14日更新====

发现这个问题有又出现了，本来设置的是自动启动Net.Tcp Listener Adapter

电脑重新开机后，这个服务没有自动启动

查看这个服务的属性-->依存关系

发现Net.Tcp Port Sharing Service没有自动启动

解决方法:

将Net.Tcp Port Sharing Service这个服务改为自动启动。

4.新建了website以及application。

website添加了net.tcp的binding之后

需要记得给application添加net.tcp的protocol

5.有可能没有安装wcf服务

https://help.genesys.com/cic/mergedProjects/wh_tr/mergedProjects/wh_tr_web_portal_marquee/desktop/activate_windows_communication_foundation_wcf.htm

Activate WCF for Windows Server 2016

1. From the Start menu, select Administrative Tools > Server Manager.

2. Select Add roles and features from the Dashboard.

3. Select Next twice.

4. Select Features.

5. In the Features area, expand the:
   - .NET Framework 3.5 Features
   and select HTTP Activation
   and Non-HTTP Activation.
   - .NET Framework 4.6 Features
   and select WCF Services.

6. Under WCF Services
   select:
   - HTTP Activation
   - Messsage Queuing (MSMQ) Activation
   - Named Pipe Activation
   - TCP Activation
   - TCP Port Sharing