【问题】
VS2012重新编译时,获得警告:“System.Configuration.ConfigurationSettings.AppSettings”已过时:“”This method is obsolete, it has been replaced by System.Configuration!System.Configuration.ConfigurationManager.AppSettings。
1 County_IP = System.Configuration.ConfigurationSettings.AppSettings["SiteIP"];
【分析】在命令集中没有引用Using System.Configuration;和引入System.configuration.
【解决】
在VS右边的“解决方案”中右键对应项目,选择“引用”,引入System.configuration。
添加Using System.Configuration;
最后,再把ConfigurationSettings写成ConfigurationManager。
1 County_IP = System.Configuration.ConfigurationManager.AppSettings["SiteIP"];
编译正常。