.NET Framework

Microsoft .NET Framework is a development platform that provides programmers with the possibility to create applications for Windows computers and servers, for Microsoft Azure, and for mobile devices that run under Windows. From this product page, end users can download the 1.1 and 2.0 versions required to install and run programs based on these editions.
With the help of this programming model, software developers can create, deploy, test and run programs on different platforms and systems. Version 1.1 and 2.0 are the oldest releases and, although they may seem obsolete, there are still plenty of applications which require them to be installed and run on Windows. These editions can be setup without conflict alongside .NET Framework 3.5 or .NET Framework 4.0/4.5 and above.
By default, the runtime is offered in English, but users can download language packs for French, Korean, Spanish, Italian, German, or  Japanese (x86, x64, and IA64), if they want to receive text messages (such as errors) in another language.
It's possible to download and install multiple language packs on the same computer. However, users can not install a different language version of .NET Framework on the same system.
Developers interested in building applications for .NET Framework 2.0 can download and install the Microsoft .NET Framework version 2.0 Software Development Kit (SDK), which provides all the tools, documentation and samples required to build and deploy such programs.

System requirements