Comparison between different versions of Dot NET

This article explains briefly about the differences between the different versions of DotNET.


.NET Framework 3.0


The change is in name only and will not affect the technologies being delivered as part of the product. The .NET Framework 3.0 is still comprised of the existing .NET Framework 2.0 components, including ASP.NET, WinForms, ADO.NET, additional base class libraries and the CLR, as well as new developer-focused innovative technologies in WPF, WCF, WF and WCS:

The .NET Framework 3.0 will still ship with Windows Vista, and will be available down-level for Windows XP and Windows Server 2003 as planned.  This change doesn’t affect in any way the ship schedules of either Windows Vista or the .NET Framework 3.0 itself.

.NET 2.0 and 3.0 share the same CLR version which means that all your .NET 2.0 applications will work fine in .NET 3.0 as well (unlike .NET 1.1 and .NET 2.0 where the CLR version changed)

.NET 3.0 = .NET 2.0 + WCF + WCS + WF + WPF


WinFX becomes the .NET Framework 3.0


Microsoft announced that WinFX will now be known as the .NET Framework 3.0. According to Somasegar’s Weblog, Microsoft decided to rename the product in order to keep continuity with previous development frameworks.

The .NET Framework has always been at the core of WinFX, but the WinFX brand didn’t convey this. The WinFX brand helped us introduce the incredible innovations in terms of Windows Presentation Foundation (WPF), Windows Communication Foundation (WCF), Windows Workflow Foundation (WF) and the newly christened Windows CardSpace (WCS) formerly known under the codename “InfoCard.” The brand also created an unnatural discontinuity between previous versions of our framework and the current version.


NET Framework 1.0


This is the initial .NET Framework. It is available on its own as a redistributable package or in a software development kit. It is also part of the first release of Microsoft Visual Studio .NET (also known as Visual Studio .NET 2002).


.NET Framework 1.1


This is the first major .NET Framework upgrade. It is available on its own as a redistributable package or in a software development kit. It is also part of the second release of Microsoft Visual Studio .NET (released as Visual Studio .NET 2003). This is the first version of the .NET Framework to be included as part of the Windows operating system – it is part of Windows Server 2003. Windows Server 2003 originally shipped with the 1.1 RTM version.


Changes since 1.0


• Built-in support for mobile ASP.NET controls. Previously available as an add-on for .NET Framework, now part of the framework.

• Security changes – enable Windows Forms assemblies to execute in a semi-trusted manner from the Internet, and enable Code Access Security in ASP.NET applications.

• Built-in support for ODBC and Oracle databases. Previously available as an add-on for .NET Framework 1.0, now part of the framework.

• .NET Compact Framework – a version of the .NET Framework for small devices.

• Internet Protocol version 6 (IPv6) support.

• Numerous API changes.


.NET Framework 2.0


Released with Visual Studio .NET 2005, Microsoft SQL Server 2005 and BizTalk 2006.

• It is included as part of Visual Studio 2005 and Microsoft SQL Server 2005.

• Version 2.0 is the last version with support for Windows 2000

.NET Framework 2.0 shipped with Windows Server 2003 R2 (not installed by default).


Changes since 1.1


• Numerous API changes.

• A new hosting API for native applications wishing to host an instance of the .NET runtime. The new API gives a fine grain control on the behavior of the runtime with regards to multithreading, memory allocation, assembly loading and more (detailed reference). It was initially developed to efficiently host the runtime in Microsoft SQL Server, which implements its own scheduler and memory manager.

• Full 64-bit support for both the x64 and the IA64 hardware platforms.

• Language support for Generics built directly into the .NET CLR.

• Many additional and improved ASP.NET web controls.

• New data controls with declarative data binding.

• New personalization features for ASP.NET, such as support for themes, skins and webparts.

• .NET Micro Framework – a version of the .NET Framework related to the Smart Personal Objects Technology initiative more….


.NET Framework 3.0


.NET Framework 3.0, formerly called WinFX[1], includes a new set of managed code APIs that are an integral part of the upcoming Windows Vista and Windows Server “Longhorn” operating systems. It is also available for Windows XP SP2 and Windows Server 2003 as a download. There are no major architectural changes included with this release; .NET Framework 3.0 includes version 2.0 of the Common Language Runtime.


.NET Framework 3.0 consists of four major new components:


• Windows Presentation Foundation (WPF), formerly code-named Avalon; a new user interface subsystem and API based on XML and vector graphics, which will make use of 3D computer graphics hardware and Direct3D technologies.

• Windows Communication Foundation (WCF), formerly code-named Indigo; a service-oriented messaging system which allows programs to interoperate locally or remotely similar to web services.

• Windows Workflow Foundation (WWF) allows for building of task automation and integrated transactions using workflows.

• Windows CardSpace (WCS), formerly code-named InfoCard; a software component which securely stores a person’s digital identities and provides a unified interface for choosing the identity for a particular transaction, such as logging in to a website.


.NET Framework 3.5


In an interview with Channel 9, Jason Zander, general manager of the .NET Framework team at Microsoft, discussed the version of the framework that will follow version 3.0.[2] Tentatively titled “version 3.5”, this version will include a new compiler that will support new features such as Language Integrated Query, as well as new language features in C# and VB.NET. This version of the framework is slated to be included with the version of Visual Studio following the 2005 release (Codenamed Orcas).


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