Understanding Section Handlers - App.config File

<?xml version="1.0" encoding="utf-8" ?>
<configuration>
<configSections>
	
	<sectionGroup name="settings">
		<section name="dbSettings" type="System.Configuration.NameValueSectionHandler"/>
	</sectionGroup>
	
	<sectionGroup name="inputScreen">
		<section name="education" type="System.Configuration.DictionarySectionHandler"/>
		<section name="sex" type="System.Configuration.SingleTagSectionHandler"/>
	</sectionGroup>
	
	<sectionGroup name="companyInfo">
			<section name="companyAddress" type="ConfigSections.MyConfigHandler,ConfigSections"/>
	</sectionGroup>
	
</configSections>

<settings>
	<dbSettings>
		<add key="connectionString" value="Data Source=localhost;Initial Catalog=Northwind;"/>
		<add key="imagesPath" value="c:\MyApp\Resources\Images\"/>
	</dbSettings>
</settings>

<inputScreen>
	<education>
		<add key="1" value="High School"/>
		<add key="2" value="Bachelors"/>
		<add key="3" value="Masters"/>
		<add key="4" value="Doctorate"/>
	</education>
	
	<sex Male="1" Female="2"/>
</inputScreen>

<companyInfo> 
	<companyAddress> 
			 <companyName>Axxonet Solutions India Pvt Ltd</companyName>
			 <doorNo>1301</doorNo>
			 <street>13th Cross, Indira Nagar, 2nd Stage</street>
			 <city>Bangalore</city>
			 <postalCode>560038</postalCode>
			 <country>India</country>
	</companyAddress>
</companyInfo>

<!--
	Read appsettings from an external file.
-->
<appSettings file="appSettings.xml"/>
<appSettings>
	<add key="author" value="Palanisamy Veerasingam"/>
	<add key="article" value="Configuration Sections"/>
</appSettings>
</configuration>