.NET Reflector lets you explore, browse, and analyze .NET assemblies

Explore, browse, and analyze .NET assemblies
* Explore .NET assemblies in an easy-to-understand, natural way
* Understand the relationships between classes and methods
* Find where types are instantiated and exposed
* Check that your code has been correctly obfuscated before release
* 30 Add-Ins available for free
.NET Reflector enables you to easily view, navigate, and search through, the class hierarchies of .NET assemblies, even if you don't have the code for them. With it, you can decompile and analyze .NET assemblies in C#, Visual Basic, and IL.
.NET Reflector lets you disassemble and analyze assemblies
View the full demo http://www.red-gate.com/products/reflector/video.htm to find out more about how .NET Reflector can help you understand what happens behind the scenes.
Red Gate has recently acquired .NET Reflector. We will continue to maintain a free version for the benefit of the community. Over the next few months we will be exploring how we can make Reflector even more useful to .NET developers.
.NET Reflector™
Feature list
* Full support for .NET 1.0, 1.1, 2.0, 3.0, and 3.5
* Windows® Shell Integration – Run Reflector.exe /register to register file extension
* Assembly lists for .NET 1.0, 1.1, 2.0, 3.0, 3.5, Compact Framework 2.0, Compact Framework 3.5, XNA framework, Silverlight, Mono, and Direct X for Managed Code
* Click navigation of source code
* Find where types are exposed or instantiated
Analyzer
* Expand methods
Expand methods
* Linq query expression support
Linq query expressions
* Lambda expression support
Lambda expressions
* Anonymous methods and nullable type support
Anonymous methods and nullable types
* Extension method support
Extension methods
* Context-sensitive documentation view
* Find virtual method overrides
* Code URL support – Navigate to code://mscorlib/System.Object in IE
Code url support
* Explore resources in assemblies
.NET Reflector™
Requirements
* Windows 2000 or later
* .NET 1.0 or later
* 128 MB RAM
* 10 MB hard disk space
http://www.red-gate.com/products/reflector/index.htm