The Microsoft .NET Framework 4 Client Profile redistributable package installs the .NET Framework runtime and associated files that are required to run most client applications.
The Microsoft .NET Framework 4 Client Profile provides a subset of features from the .NET Framework 4. The Client Profile is designed to run client applications and to enable the fastest possible deployment for Windows Presentation Foundation (WPF) and Windows Forms technology. Application developers who require features that are not included in the Client Profile should target the full .NET Framework 4 instead of the Client Profile.
Earlier version of the .NET Client Profile was only available to XP x86 machines without any .NET Framework installed. With .NET Framework 4, supported OS and machine architectures with or without earlier versions of the Framework can install the Client Profile to take advantage of the faster deployment and improved features of .NET Framework 4.
The Microsoft .NET Framework 4 Client Profile provides the following new features and improvements:
* Improvements in Common Language Runtime (CLR) and Base Class Library (BCL)
o Performance improvement including better multicore support, background garbage collection, and profiler attach on server.
o New memory mapped file and numeric types.
o Easier debugging including dump debugging, Watson minidumps, mixed mode debugging for 64 bit and code contracts.
o For a comprehensive list of enhancements to CLR and BCL go here.
* Innovations in the Visual Basic and C# languages, for example statement lambdas, implicit line continuations, dynamic dispatch, and named/optional parameters.
* Improvements in Data Access and Modeling
o The Entity Framework enables developers to program against relational databases using .NET objects and Language Integrated Query (
o WCF Data Services is a component of the .NET Framework that enables you to create REST-based services and applications that use the Open Data Protocol (OData) to expose and consume data over the Web. WCF Data Services has many new features, including enhanced BLOB support, data binding, row count, feed customization, projections, and request pipeline improvements. Built-in integration with Microsoft Office 2010 now makes it possible to expose Microsoft Office SharePoint Server data as an OData feed and access that data feed by using the WCF Data Services client library. For more information go here.
* Improvements in Windows Presentation Foundation (WPF)
o Added support for Windows 7 multi-touch, ribbon controls, and taskbar extensibility features.
o Added support for Surface 2.0 SDK.
o New line-of-business controls including charting control, smart edit, data grid, and others that improve the experience for developers who build data centric applications.
o Improvements in performance and scalability.
o Visual improvements in text clarity, layout pixel snapping, localization, and interoperability.
o For a comprehensive list of enhancements to WPF go here.