Providing intellisense/xsd validation to configsections

<configuration>
 <configSections>
    <section name="pizza" type="TestConfig.Configuration.PizzaConfigurationSection, TestConfig.Configuration"/>
 </configSections>

 <pizza name="Margherita" timeToCook="00:10:00" price="15.12">
   <cook firstName="Nicola" lastName="Carrer" rank="7" />
   <toppings>
     <add name="Mozzarella" percentage="0.6" />
     <add name="Tomato sauce" percentage="0.28" />
     <add name="Oregano" percentage="0.02" />
     <add name="Mushrooms" percentage="0.1" />
   </toppings>
 </pizza>
</configuration>