Development Tools

Microsoft .NET Framework 3.5

Microsoft .NET Framework 3.5 was developed by Microsoft, which is pronounced as a “dot net” to mainly run on MS Windows. It comprises FCL (Framework Class Library) which is a large class library and provides interoperability of languages i-e one language can use the code even if that is written in other languages each language can use code written in other languages. The interoperability works across many programming languages. You may like to visit the official website for a detailed review.

Microsoft .NET Framework 3.5 – Review

The Programs that are written for .NET Framework have been executed in software rather than hardware environment which is known as CLR (Common Language Runtime). It is comprised of the combination of FCL and CLR. ┬áThe 3.5 of .Net Framework was launched in the market by Microsoft in the month of November 2007. A new Compact Framework 3.5 was also launched in tandem with this version to support the additional features of Embedded CE devices and Mobile associated with Windows. Microsoft has always updated the .NET Framework 3.5 technology with new features and enhancements as done in version 3.5 and is still doing so according to the customers’ feedback. You can also download .Net Framework 2.0.

Microsoft .NET Framework 3.5 – Features


CLR or Common Language Runtime is the application virtual machine that supports its services including management, memory, exception handling, and security. As such, the code written in .NET Framework 3.5 is termed “managed code”.


FCL or Frame Class Library provides a user interface, cryptography, data access, web application development, database connectivity, cryptography, network communications, and numeric algorithms. The source code of FCL in the 3.5 version has been released partially for only the reference of debugging under the license of Microsoft Reference Source.


Programmers develop the software by integrating their source code and .NET Framework with other libraries. Most new applications that are developed for MS Windows tend to use the framework.

Service packs

.NET Framework 3.5 installs the service packs 1 of version 2.0 and 3.0 along with the SP1 of 3.5 as well. This adds some properties and methods to BCL (Base Class Library) of .Net Framework 2.0 such as LINQ (Language Integrated Query).

The new features as assemblies

NET Framework 3.5 not only is developed with the enhancements done in .NET Framework 3.0. such as feature sets in Windows WF (Workflow Foundation), WCF (Windows Communication Foundation), WPF (Windows Presentation Foundation), and Windows CardSpace; but in addition 3.5 also contains numerous new features as well in various areas of its technology. These new features are incorporated in this version in the form of new assemblies in order to avoid breaking changes. These new features are as follows:

Deep integration of LINQ

It has integrated Language Integrated Query to data awareness which enables the users to write codes that are written in LINQ-enabled languages. This also allows such codes to be filtered and enumerated, and projections to be created in terms of various SQL data collections, DataSets, and XML through the same syntax.


ASP. NET AJAX allows the users to create more interactive, more efficient, and extremely personalized Web-based experiences that have the ability to function across the most popular and most used browsers.

New support of Web protocol

It provides support to build WCF (Windows Communication Foundation) services such as JSON, AJAX, REST, RSS, POX, ATOM, and various other new WS standards.

Full tooling support in Visual Studio

3.5 also provides complete tooling support to the Visual Studio of 2008 for WF (Workflow Foundation), WCF (Windows Communication Foundation), WPF (Windows Presentation Foundation) along with the technology of new workflow-enabled services.

New classes in BCL

The developers have included BCL (Base class library) in the .NET Framework 3.5 that addresses the number of common requests that were made by the users as feedback of the prior version.

Microsoft .NET Framework 3.5 – Technical Details

Title: Microsoft .NET Framework 3.5
Added OnJanuary 13, 2022 1:22 pm
Updated OnSeptember 27, 2023 10:18 pm
Version: 3.5
Category: Development Tools
License Type: Freeware
Operating System: Windows 11, 10, 8, 8.1, 7, XP, and Vista
Developers:Microsoft Inc
File Name: dotnetfx3.5.1.exe
File Size: 231.50 MB

Microsoft .NET Framework 3.5 Free Download 32/64bit

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