带有基于OP config文件的代码的完整示例：

<configuration>
    <configSections>
        <section name="registerCompanies" 
                 type="My.MyConfigSection, My.Assembly" />
    </configSections>
    <registerCompanies>
        <add name="Tata Motors" code="Tata"/>
        <add name="Honda Motors" code="Honda"/>
    </registerCompanies>
</configuration>

这是示例示例，用于实现折叠集合的自定义配置部分

using System.Configuration;
namespace My {
public class MyConfigSection : ConfigurationSection {
    [ConfigurationProperty("", IsRequired = true, IsDefaultCollection = true)]
    public MyConfigInstanceCollection Instances {
        get { return (MyConfigInstanceCollection)this[""]; }
        set { this[""] = value; }
    }
}
public class MyConfigInstanceCollection : ConfigurationElementCollection {
    protected override ConfigurationElement CreateNewElement() {
        return new MyConfigInstanceElement();
    }

    protected override object GetElementKey(ConfigurationElement element) {
        //set to whatever Element Property you want to use for a key
        return ((MyConfigInstanceElement)element).Name;
    }
}

public class MyConfigInstanceElement : ConfigurationElement {
    //Make sure to set IsKey=true for property exposed as the GetElementKey above
    [ConfigurationProperty("name", IsKey = true, IsRequired = true)]
    public string Name {
        get { return (string) base["name"]; }
        set { base["name"] = value; }
    }

    [ConfigurationProperty("code", IsRequired = true)]
    public string Code {
        get { return (string) base["code"]; }
        set { base["code"] = value; }
    } } }

这是如何从代码访问配置信息的示例。

var config = ConfigurationManager.GetSection("registerCompanies") 
                 as MyConfigSection;

Console.WriteLine(config["Tata Motors"].Code);
foreach (var e in config.Instances) { 
   Console.WriteLine("Name: {0}, Code: {1}", e.Name, e.Code); 
}