警告“System.Configuration.ConfigurationSettings.GetConfig(string)”已过时:“This method is obsolete, it has been replaced by System.Configuration!System.Configuration.ConfigurationManager.GetSection”
警告 1 “System.Configuration.ConfigurationSettings.AppSettings”已过时:“This method is obsolete, it has been replaced by System.Configuration!System.Configuration.ConfigurationManager.AppSettings”
注意:默认没有引用ConfigurationManager类，所以找不到System.Configuration命名空间的 ConfigurationManager类.
解决:首先添加加对System.Configuration.dll 文件的引用;:在将"System.Configuration.ConfigurationSettings.GetConfig替换为System.Configuration.ConfigurationManager.GetSection
将“System.Configuration.ConfigurationSettings.AppSettings”替换为System.Configuration.ConfigurationManager.AppSettings”
MS对这一点提示比较隐晦而已——
This method is obsolete, it has been replaced by System.Configuration!System.Configuration.ConfigurationManager.AppSettings
上面那段话多了System.Configuration!