Link to a picture showing what version of the .NET Framework is built into what version of Windows
For a while now, I’ve been maintaining a list of what version of the .NET Framework ships with each version of Windows. The list has gotten longer and more complicated over time as new versions of Windows and the .NET Framework have been released, plus the .NET Framework is off by default in some server versions of Windows.
Today, I noticed that Peter Marcu posted a very handy graphical view of what versions of the .NET Framework starting with 2.0 are a part of what version of Windows, including whether it is optional and on or off by default when you install Windows.
You can check out this graphical view at http://blogs.msdn.com/pmarcu/archive/2010/02/05/which-version-of-net-is-built-into-windows.aspx.