Welcome to the .NET Browser, brought to you by Code Architects and the 2TheMax Team. Use this browser to explore all the assemblies, namespaces, types, and members in version 1.1 and 2.0 of the Microsoft .NET Framework; quickly determine which items have been added, removed, or modified from previous version; explore the .NET class library with search criteria that more flexible than those offered by the Visual Studio .NET object browser; learn more about each item by hovering the mouse on it. Notice that individual pages have distinct URLs, so you can bookmark them.
http://www.dotnet2themax.com/DotNetBrowser/ShowAssemblies.aspx