How to check the version of the dotnet framework installed.

[Mike Peterson]

I'm trying to develop an install kit for an application
that requires an already installed instance of the dotnet
framework. What is the best way to determine if/what is
already installed? Registry setting - if so which one?
Individual file - if so which one?

 

[Dino Chiesa [MSFT]]

FAQ

How can I verify if the .NET Framework has been installed?
Two ways:
1. check the Windows Registry for
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\.NETFramework\InstallRoot
2. check for a local directory like
%windir%\Microsoft.NET\Framework\<version>
where <version> is
v1.1.4322 - for .NET Framework v1.1
v1.0.3705 - for .NET Framework v1.0

 

[manjucv]

Hey this script not only contains script to check dotnet frame work but also to check previous version installed and automatically uninstall the old version

http://www.ceveni.com/2008/03/check-dotnet-framework-using-innosetup.html

 

[scottchiu]

You can also try to check

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\.NETFramework

and

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\NET Framework Setup

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[nimd4]

Btw., there's the .NET Version Detector 2010 @

asoft.be/prod_netver.html

+ a whole other bunch of ways..