c# [app.config] 找不到 "ConfigurationManager",即使添加了命名空间 using System.Configuration;

时间:2016年08月15日17:06:10 星期一  Ken

http://stackoverflow.com/questions/1274852/the-name-configurationmanager-does-not-exist-in-the-current-context

解决方法:需要添加引用  system.configuration

The name 'ConfigurationManager' does not exist in the current context

It's not only necessary to use the namespace System.Configuration. You have also to add the reference to the assembly System.Configuration.dll

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写

<appSettings>
    <add key="Host" value="smtp.163.com" />
    <add key="Port" value="25" />
  </appSettings>

读

private string strHost = ConfigurationManager.AppSettings["Host"];

参考: http://www.cnblogs.com/go-onxp/archive/2012/11/07/2758144.html

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另外一个异常  "app.config配置系统未能初始化"

解决方法: appSettings元素调到configSections元素后面就行了。