Versions of the .NET Framework

The released versions of the .NET Framework have the following version information.
.NET Framework version    Revision    Version 3.5    Original release     3.5.21022.8 3.5    Service Pack 1    3.5.30729.1 3.0    Original release    3.0.4506.30 3.0    Service Pack 1    3.0.4506.648 [...]

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How to determine which versions of the .NET Framework

How to determine which versions of the .NET Framework are installed To determine which versions of the .NET Framework are installed, locate the %systemroot%\Microsoft.NET\Framework folder. To open this folder, you can paste this address into a Windows Explorer address bar.
The following folders contain the released versions of the .NET Framework: [...]