How to identify if .net framework is installed in a system and it version using command prompt [duplicate]

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Possible Duplicate:

Is there a way to determine the .NET Framework version from the command line?

How to identif开发者_运维问答y if .net framework is installed in a system and it version using command prompt? Thanks in advance.

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the best way to do this is simply by issuing the following command from cmd

dir /Ad %systemroot%\Microsoft.NET\Framework

this will give you a list of .net frameworks installed.

more info can be found here:

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Another alternative is to check if %systemroot%\Assembly exists, as there will always be an assembly cache (GAC) folder.

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In cmd

reg query "HKLM\Software\Microsoft\NET Framework Setup\NDP"

or in powershell

gci "HKLM:Software\Microsoft\NET Framework Setup\NDP"

These registry keys, and those top detect particular service packs, are described in the accepted answer to this question.