string settingValue = ConfigurationManager.AppSettings.Get("setting1");
读配置文件 方法(2)
string settingValue = config.AppSettings.Settings["setting1"].Value;
写配置文件
config.AppSettings.Settings["setting1"].Value = "123";
config.Save(ConfigurationSaveMode.Modified);
App.config
<configuration>
<appSettings>
<add key="setting1" value="123" />
</appSettings>
</configuration>
注:不要试图用这种方法来写配置文件,这种方法根本写不了配置文件的:
ConfigurationManager.AppSettings.Set("setting1", "123");