Two of my ISVs were asking about Microsoft applications which use the .NET Framework. When I had a quick look on the web I found a very good but quite old post from Daniel on this area (still very much worth a read) http://blogs.msdn.com/danielfe/archive/2004/11/02/251254.aspx

I think it is probably time for an update.

Code sizes:

• Visual Studio 2005: 7.5 million
• 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 Blend: 250K lines  
• SharePoint Portal Server: 200K lines
• Content Management Server: 100K lines
• Dynamics SL has 3.4 million Lines

And some more...

• Card Space
• Microsoft Business Portal
• Dynamics CRM
• Microsoft Student 2005 (Encarta 2005) has innovations based on .NET
• Office Accounting 2007
• Office SharePoint Server 2007
• Outlook Calendar Printing Assistant
• SQL Reporting Services
• Widnows Live OneCare
• Windows Live toolbar
• Windows Live for TV
• Windows PowerShell
• Windows XP Media Center Edition (eHome is a managed application)
• Windows XP Tablet PC Edition (part of the shell is managed)
• XPS

And undoubtedly others which I have forgotten!!!