New Post: How to implement IIS / Website in WIX#

<DirectoryRef Id="INSTALLFOLDER">

  <Component Id="DemoWebsiteAppPool" Guid="" KeyPath="yes">
    <iis:WebAppPool Id="DemoWebsiteAppPool" Name="DemoWebsite" Identity="applicationPoolIdentity" ManagedPipelineMode="Integrated" ManagedRuntimeVersion="v4.0" />
  </Component>

    <Component Id="InstallWebsite" Guid="" KeyPath="yes">
        <!-- Install to default web site -->
        <iis:WebSite Id="DemoWebsiteWebsite" Description='Demo Website' Directory='INSTALLFOLDER' AutoStart='yes' StartOnInstall='yes'>
          <iis:WebAddress Id="AllUnassigned" Port="80" />
          <iis:WebApplication Id="DemoWebsiteApplication" Name="[DemoWebsiteWebsite][WEBSITE_ID]" WebAppPool="DemoWebsiteAppPool"></iis:WebApplication>
        </iis:WebSite>
      </Component>


</DirectoryRef>