使用 ConfigurationSection 创建自定义配置节

   <!-- ////////////////////////////////////////////////////////////////////////////////////////////// -->
   < configSections >
     < sectionGroup  name ="mygroup" >
       < section  name ="mysection"
                       type ="ConfigSection"
                        allowDefinition ="Everywhere"
                         allowLocation ="true" />
     </ sectionGroup >
   </ configSections >
   <!-- ////////////////////////////////////////////////////////////////////////////////////////////// -->

   < mygroup >
     < mysection   user ="用户"  password ="密码" >
       < element  element1 ="属性1"  element2 ="属性2" ></ element >
     </ mysection >
   </ mygroup >

using  System;
using  System.Data;
using  System.Configuration;
using  System.Web;
using  System.Web.Security;
using  System.Web.UI;
using  System.Web.UI.WebControls;
using  System.Web.UI.WebControls.WebParts;
using  System.Web.UI.HtmlControls;

///   <summary>
///  ConfigSection 的摘要说明
///   </summary>
public   class  ConfigSection:ConfigurationSection
{
     public  ConfigSection()
    {
         //
         //  TODO: 在此处添加构造函数逻辑
         //
    }
[ConfigurationProperty( " user " ,DefaultValue = " yanghong " ,IsRequired = true )]
     public   string  User
    {
         get  {  return  ( string ) this [ " user " ]; }
         set  {  this [ " user " ]  =  value; }
    }

    [ConfigurationProperty( " password " ,DefaultValue = " password " ,IsRequired = true )]
     public   string  PassWord
    {
         get  {   return  ( string ) this [ " password " ]; }
         set  {  this [ " password " ]  =  value; }
    }

    [ConfigurationProperty( " element " )]
     public  elementinfo Element
    {
         get  {  return   (elementinfo) this [ " element " ]; }
         set  { this [ " element " ]  =  value; }
    }
}
  public   class  elementinfo : ConfigurationElement
{
     public  elementinfo()    { }


    [ConfigurationProperty( " element1 " , DefaultValue  =   " element1 " , IsRequired  =   true )]
     public   string  Element1
    {
         get  {  return  ( string ) this [ " element1 " ]; }
    }

    [ConfigurationProperty( " element2 " ,DefaultValue = " element2 " ,IsRequired = true )]
     public   string  Element2
    {
         get  {  return  ( string ) this [ " element2 " ]; }
    }


}

ConfigSection config  =  (ConfigSection)ConfigurationManager.GetSection( " mygroup/mysection " );
        Response.Write( " 用户名: " + config.User.ToString()  +   " 密码: "   +  config.PassWord.ToString()  +   " 元素属性: "   +  config.Element.Element1.ToString()  +  config.Element.Element2.ToString());

转自“：http://www.cnblogs.com/flyyanghong/archive/2007/11/01/945930.html