Introducing .NET FrameWork, What is DOTNET Framework? What is .NET Framework?

• .NET Framework is an essential component of the Windows operating system that helps create applications by integrating different programming languages, such as C#, Visual Basic, J# and Visual C++
• .NET Framework consists of a virtual execution system called Common Language runtime (CLR) and a set of class libraries.
• Microsoft introduced .NET to bridge the gap between applications created in different languages and ensure interoperability between them.

Version	Version Number	Release Date	Visual Studio	Default in Windows
1.0	1.0.3705.0	2002-02-13	Visual Studio .NET	Windows XP Tablet and Media Center Editions
1.1	1.1.4322.573	2003-04-24	Visual Studio .NET 2003	Windows Server 2003
2.0	2.0.50727.42	2005-11-07	Visual Studio 2005	Windows Server 2003 R2
3.0	3.0.4506.30	2006-11-06		Windows Vista, Windows Server 2008
3.5	3.5.21022.8	2007-11-19	Visual Studio 2008	Windows 7, Windows Server 2008 R2
4.0	4.0.30319.1	2010-04-12	Visual Studio 2010
4.5	4.5.40805	2011-09-13 (Developer Preview)	Visual Studio '11'	Windows 8, Windows Server 8