app.config 未将对象引用设置到对象实例

app.config <?xml version="1.0" encoding="utf-8" ?> <configuration>     <connectionStrings>       <clear/>         <add name="TgNetVideo.Properties.Settings.shidevideoConnectionString"             connectionString="server=192.168.1.121;user id=shide;password=shide;persist security info=True;database=shidevideo;port=3307"             providerName="MySql.Data.MySqlClient" />     </connectionStrings> </configuration> 引用：private string CONNSTR = System.Configuration.ConfigurationManager.ConnectionStrings["TgNetVideo.Properties.Settings.shidevideoConnectionString"].ToString(); 刚开始只是引用了shidevideoConnectionString。老是出现“未将对象引用设置到对象实例”错误！

转载于:https://www.cnblogs.com/goodyao/archive/2008/07/08/1238172.html