web.config 파일 사용자 정의 프로필 사용 방법의 간단한 예

<configsections> 
   <section name= "appconfig" type= "myapp.appconfig, myapp" /> 
</configsections>  

<appconfig>
  <add key= "connectionstring" value= "this is a connectionstring" /> 
  <add key= "usercount" value= "199" />
</appconfig>

public class appconfig : iconfigurationsectionhandler
{
   static string m_connectionstring = string.empty;
   static int32 m_usercount = 0;
   public static string connectionstring
  {
   get
   {
     return m_connectionstring;
   }
  }
   public static int32 usercount
  {
   get
   {
     return m_usercount;
   }
  }

   static string readsetting(namevaluecollection nvc, string key, string defaultvalue)
  {
    string thevalue = nvc[key];
    if(thevalue == string.empty)
     return defaultvalue;

    return thevalue;
  }

   public object create( object parent, object configcontext, xmlnode section)
  {
   namevaluecollection settings;

    try 
   { 
    namevaluesectionhandler basehandler = new namevaluesectionhandler(); 
    settings = (namevaluecollection)basehandler.create(parent, configcontext, section); 
   } 
    catch 
   { 
    settings = null; 
   } 

    if ( settings != null ) 
   { 
    m_connectionstring = appconfig.readsetting(settings, "connectionstring", string.empty); 
    m_usercount = convert.toint32(appconfig.readsetting(settings, "usercount", "0")); 
   } 

    return settings; 
  }
}

system.configuration.configurationsettings.getconfig( "appconfig");