Tramite il tag object è possibile inserire Silverlight in una pagina html:
XML
<div id="silverlightControlHost">
  <object data="data:application/x-silverlight-2," type="application/x-silverlight-2" width="100" height="100">
    <param name="source" value="http://sharepoint2007/SL/DownloaderSL.xap"/> 
    <param name="onError" value="onSilverlightError" /> 
    <param name="background" value="white" /> 
    <param name="minRuntimeVersion" value="4.0.50826.0" /> 
    <param name="autoUpgrade" value="true" />
    <a href="http://go.microsoft.com/fwlink/?LinkID=149156&v=4.0.50826.0" style="text-decoration:none"> 
      <img src="http://go.microsoft.com/fwlink/?LinkId=161376" alt="Get Microsoft Silverlight" style="border-style:none"/>  
     </a>
  </object>
  <iframe id="_sl_historyFrame" style="visibility:hidden;height:0px;width:0px;border:0px"></iframe>
</div>

Per maggiori info vedi How to: Add Silverlight to a Web Page by Using HTML
Potrebbe interessarti anche: