ASP.NET

ASP .NET: Web Forms Let You Drag and Drop Your Way to Powerful Web Apps
http://msdn.microsoft.com/msdnmag/issues/01/05/WebForms/WebForms.asp

VB.NET

Visual Basic .NET: New Programming Model and Language Enhancements Boost Development Power
http://msdn.microsoft.com/msdnmag/issues/01/02/vbnet/vbnet.asp

C#

Deep Inside C#: An Interview with Microsoft Chief Architect Anders Hejlsberg
http://windows.oreilly.com/news/hejlsberg_0800.html

XML web services

XML Web Services Basics
http://msdn.microsoft.com/library/en-us/Dnwebsrv/html/webservbasics.asp
Web Services: Building Reusable Web Components with SOAP and ASP .NET
http://msdn.microsoft.com/msdnmag/issues/01/02/webcomp/webcomp.asp

Winforms

Windows Forms: A Modern-Day Programming Model for Writing GUI Applications
http://msdn.microsoft.com/msdnmag/issues/01/02/winforms/winforms.asp

Performance Tips and Tricks in .NET Applications

http://msdn.microsoft.com/library/en-us/dndotnet/html/dotnetperftips.asp

Authentication in ASP.NET: .NET Security Guidance

http://msdn.microsoft.com/library/en-us/dnbda/html/authaspdotnet.asp

Microsoft .NET/COM Migration and Interoperability

XML Web Services Basics
http://msdn.microsoft.com/library/en-us/dnbda/html/cominterop.asp

Using the Office XP Web Services Toolkit 2.0 in Microsoft Word 2002

http://msdn.microsoft.com/library/default.asp?url=/library/en-us/dnxpwst2/html/odc_wsrwd.asp

Link to US MSDN Site overall

http://msdn.microsoft.com/default.asp