Sculpture is a .NET open source Model-Driven Development code generation framework... can model your application components, and then transform this model to deployable components ... comes with ready-made molds like NHibernate, LINQ, WCF, etc
Managed Extensibility Framework (MEF) is a new library in .NET that enables greater reuse of applications and components ... but it's (currently) licensed under the unacceptable MS-LPL ... where that extra L stands for "lock-in"
Code Runner .NET provides the ability to run C# source files directly from the command line just as if they were scripts. Tools are provided to allow you to easily edit and debug the script with the full power of the Microsoft Visual Studio programming environment.
This means the Primary Key will not contain the actual auto-increment from the database until the DataSet is updated. Therefore, the auto-increment value is relative to the DataSet only. For this reason, I have found it wise to set the AutoIncrementSeed to 0 and the AutoIncrementStep to -1.
The aggregating blog for the BCL (Base Class Library) for the .Net Framework. Tons of information here as they work toward a new version of the .Net Framework
A good place to start if you want to do trace or debug messages from .NET, this article explains the differences between trace and debug, how you can turn them on and off, and how you can set them to trace to file or event log without recompiling. Excellent.
This C# OpenID library adds OpenID 2.0 Provider and Relying Party support to your web site both programmatically and through convenient drop-in ASP.NET controls.
Crack.NET is a runtime debugging and scripting tool that gives you access to the internals of a WPF or Windows Forms application running on your computer.
The WMI Code Creator tool allows you to generate VBScript, C#, and VB .NET code that uses WMI to complete a management task such as querying for management data, executing a method from a WMI class, or receiving event notifications using WMI.