The site offers a variety of controls and classes for the .NET developer, including a TraficMonitor for ASP.NET sites.
Tons of cool utilities
The .NET Show
The .NET Show keeps you up to date on the cutting-edge technologies that can make a difference in your Windows and Web applications.
Deploy Your .NET App
This article contains information regarding how to create a setup package for deploying your .NET application.
Lutz Roeder's .NET Site
This site has a bunch of really cool programs that help in investigating IL as well as several useful utilities and games.
NUnitASP is a tool for testing ASP.NET web pages. It's a tool meant to do unit testing for developers.
Allows you to debug all HTTP traffic between your computer and the Internet.
Cool ASP.NET server control to add menus to your web application.
C# Design Patterns
This site contains some real-world programming solutions using software design patterns.
.NET Patterns: Architecture, Design, and Process
This is a good book on .NET design patterns. Written by a Microsoftie with a strong J2EE background.
Really cool site about handling platform invoke.
Design Guidelines for Class Library Developers
This link contains recommended guidelines to encourage consistency and cross-language integration.
Popular cross-browser HTML editor for ASP.NET