We have an old project lying around with these tags in every page. This website is an intranet web application.
<meta name="GENERATOR" content="Microsoft Visual Studio 7.0" />
<meta name="CODE_LANGUAGE" content="C#" />
<meta name="vs_defaultClientScript" content="JavaScript" />
<meta name="vs_targetSchema" content="http://schemas.microsoft.com/intellisense/ie5" />
I'm using VS2005 if that matters for the intellisense.