With each day that goes by, the .NET Framework runtime environment becomes an even more important element of the Windows operating systems and the version included in the final release of Windows 8 is .NET Framework 4.5
Why is it so important?
The main reason why .NET Framework 4.5 is so important is because it offers coders a runtime environment for their programs that can work with several programming languages at the same time, thus avoiding having to have a program that's all written in the same language.
The variety of languages supported by .NET Framework 4.5 is very large and covers all the main programming languages, including C#, C++, Visual Basic .NET, Perl, Python,...
The future of programming for Windows.
Microsoft's main idea is to transform .NET Framework into the main application on which all programs developed for Windows will be based, and it also has the added bonus of implementing programs for Windows Azure, their platform on the cloud.
Therefore, if you want to see what the new implementation of the runtime environment by Microsoft will include, go ahead and download .NET Framework 4.5 for free.