This guideline provides detailed overview of System.Web assembly and the new
classes and methods in ASP.NET 4.0, which were released with Visual Studio 2010
Document is subject to change – we are trying to find detailed information
about all new stuff and update description column. The latest document version
is available there. Send us your
comments and suggestion via this online form.
ASP.NET 4.0 introduces several changes to the web assemblies and also merges
several dlls that existed in .NET 2.0 - 3.5 SP1. For example, new features from
ASP.NET 3.5 SP1 System.Web.Abstractions.dll are merged with System.Web.dll,
under System.Web namespace.
Beta1 of ASP.NET 4.0 introduced 42 new classes/interfaces/enums and
22 modifications of the existing ASP.NET 3.5 SP1 functionality.
Take into account, that Beta1 doesn’t provide the complete list of the new
features – they can add new stuff or remove existed one prior to the final