using System;

 using System.Collections.Generic;

 using System.Configuration;

 using System.IO;

 using System.Linq;

 using System.Runtime.InteropServices.ComTypes;

 using System.Text;

 using System.Threading.Tasks;

 using System.Xml;

 using System.Xml.Serialization;

 namespace SampleConfigSectionHandle

 {

     public sealed class ExampleConfigurationSectionHandler : IConfigurationSectionHandler

     {

         public object Create(object parent, object configContext, XmlNode section)

         {

             var xmlSerializer = new XmlSerializer(typeof(UserInfo));

             using (var stream = new MemoryStream(Encoding.Default.GetBytes(section.InnerXml)))

             {

                 var xmlNode = XmlReader.Create(stream);

                 return xmlSerializer.Deserialize(xmlNode);

             }

         }

     }

     public class UserInfo

     {

         public string UserName { get; set; }

         public string UserPwd { get; set; }

     }

 }

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

 <configuration>

   <configSections>

     <!--示例配置节-->

     <section name="example" type="SampleConfigSectionHandle.ExampleConfigurationSectionHandler,SampleConfigSectionHandle"/>

   </configSections>

   <startup>

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

   </startup>

   <!--配置节实例-->

   <example>

     <UserInfo>

       <UserName>WangYa</UserName>

       <UserPwd>123456</UserPwd>

     </UserInfo>

   </example>

 </configuration>

using System;

using System.Collections.Generic;

using System.Configuration;

using System.Diagnostics;

using System.Linq;

using System.Text;

using System.Threading.Tasks;

namespace SampleConfigSectionHandle

{

    class Program

    {

        static void Main(string[] args)

        {

            var config = ConfigurationManager.GetSection("example") as UserInfo;

            if (config != null)

            {

                Console.WriteLine(config.UserName);

                Console.WriteLine(config.UserPwd);

            }

            Console.Read();

        }

    }

}