>Read Ted Roche's blog entry on this event:
>
>http://radio.weblogs.com/0117767/2006/02/08.html#a1856

There are many parts of Vista which are lower level than the .NET Framework class libraries. .NET is used for all of Windows Presentation Framework (code name Avalon) which is a big part of Vista. For other references, check out the blog post at http://blogs.msdn.com/danielfe/archive/2005/12/16/504847.aspx where Dan Fernandez writes:

The Microsoft's not using Managed Code Myth
One of the biggest challenges in my old job was that customers didn't think Microsoft was using managed code. Well, the truth is that we have a good amount of managed code in the three years that the .NET Framework has been released including operating systems, client tools, Web properties, and Intranet applications. For those of you that refuse to believe, here's an estimate of the lines of managed code in Microsoft applications that I got permission to blog about:

Visual Studio 2005: 7.5 million lines
SQL Server 2005: 3 million lines
BizTalk Server: 2 million lines
Visual Studio Team System: 1.7 million lines
Windows Presentation Foundation: 900K lines
Windows Sharepoint Services: 750K lines
Expression Interactive Designer: 250K lines
Sharepoint Portal Server: 200K lines
Content Management Server: 100K lines