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        static void Main(string[] args)

        {           

//讀取當(dāng)前exe的config：App.config

//讀取appSettings節(jié)點(diǎn)里的數(shù)據(jù)

            NameValueCollection nameValues = ConfigurationManager.AppSettings;

            string ssssss = nameValues["Key"];

//讀取當(dāng)前exe的config：App.config

        //使用exe路徑

            Configuration configuration = ConfigurationManager.OpenExeConfiguration(Assembly.GetEntryAssembly().Location);

            AppSettingsSection ass = configuration.AppSettings;

            string sss = ass.Settings["Key"].Value;

       //讀取configSections里的數(shù)據(jù)

            ConfigurationSectionGroup group = configuration.GetSectionGroup("Group");

            AppSettingsSection group1 = (AppSettingsSection)group.Sections.Get("Group1");

            string str = group1.Settings["Key"].Value;

            Console.WriteLine(str);

//改變值

            group1.Settings["Key"].Value = "ChangedValue";

// 保存

            configuration.Save();

//讀取dll的config文件：TestDll.dll.config

            Type tp = typeof(Class1);

            Configuration config = ConfigurationManager.OpenExeConfiguration(tp.Assembly.Location);

            ConfigurationSectionGroup _group = config.GetSectionGroup("Group");

            AppSettingsSection appss = (AppSettingsSection)_group.Sections.Get("SubGroup");

            Console.WriteLine(appss.Settings["TestKey"].Value);

            Console.ReadLine();

        }

App.config文件：

<?xml version="1.0" encoding="utf-8" ?>

<configuration>

 

  <configSections>

    <pGroup name="Group">

      <p name="Group1" type="System.Configuration.AppSettingsSection"/>

      <p name="Group2" type="System.Configuration.AppSettingsSection"/>

    </pGroup>

  </configSections>

  <Group>

    <Group1>

      <add key ="Key" value="10"/>

    </Group1>

    <Group2>

      <add key ="Key" value="10"/>

    </Group2>

  </Group>

 

  <appSettings>

    <add key="Key" value="Value"/>

  </appSettings>

  <startup>

    <supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.5" />

  </startup>

</configuration>

TestDll.dll.config文件：

<?xml version="1.0" encoding="utf-8" ?>

<configuration>

  <configSections>

    <pGroup name="Group">

      <p name="SubGroup" type="System.Configuration.AppSettingsSection"/>

    </pGroup>  

  </configSections>

  <Group>

    <SubGroup>

      <add key="TestKey" value="TestValue"/>

    </SubGroup>

  </Group>

</configuration>

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