Programmatically determine .NET framework version

Question

Does anyone know of a way to programmatically determine which version of the .NET framework is installed on a computer?  I was thinking of trying to scan the registry, but my main worry is that a user would need admin rights if trying to use the method of scanning the registry.

Answer 1

If you dont like the registry, maybe you can write code that will check for .net installation directory for the install version. Below are directories to all .net version

C:\WINDOWS\Microsoft.NET\Framework\v1.0.3705
C:\WINDOWS\Microsoft.NET\Framework\v1.1.4322
C:\WINDOWS\Microsoft.NET\Framework\v2.0.50727
C:\WINDOWS\Microsoft.NET\Framework\v3.0
C:\WINDOWS\Microsoft.NET\Framework\v3.5
C:\WINDOWS\Microsoft.NET\Framework\v4.0.30319

kaymaf

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Answer 2

I don't mind using the registry, I just don't know what, if any permissions are need to read a value that is in the registry.

Answer 3

I don't mind using the registry, I just don't know what, if any permissions are need to read a value that is in the registry.

Try it and see what happen when you want to access the registry

kaymaf

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CODE CONVERTER SITE

http://www.carlosag.net/Tools/CodeTranslator/.

http://www.developerfusion.com/tools/convert/csharp-to-vb/.

Answer 4

Hello,

Can you give us any idea of what your purpose is for that, I cannot think of any.

You run a .Net program with a certain framework and cannot change that. 

If there is no framework, you cannot run that.

 

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Success
Cor

Answer 5

Cor,

In case you are wondering why I'm asking for a check for the currently installed .NET version, it is because my work is making a major update to an application in a few months (we are going to use WCF as the data layer) and we need to find out which customers have installed .NET 3.5 on their computers so the updates will work for them.  Currently the application is .NET 2.0.

Answer 6

I find the suggestion from Kaymaf pretty good,

Simply get the names from the IO.Directory.Info and then investigate that, should be pretty easy.

http://msdn.microsoft.com/en-us/library/system.io.directoryinfo.aspx

In fact you only have to know if that 

C:\WINDOWS\Microsoft.NET\Framework\v3.5 

folder exists

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Success
Cor

Answer 7

Thank you All for your friendly help and support!

 

Please check the following similar cases with code samples, which provided several approaches to detect which version of .NET Framework is installed.

http://social.msdn.microsoft.com/Forums/en-US/vbgeneral/thread/25287435-722e-4064-862f-f9a5fa04ec73

http://social.msdn.microsoft.com/Forums/en-US/vblanguage/thread/1901d1fa-da33-4377-aad3-8aacd673cafc

 

Detect which version of the .NET Framework is installed

http://www.agusblog.com/wordpress/c-code-to-determine-which-version-of-the-net-framework-is-installed-177.htm

 

Using managed code to detect what .NET Framework versions and service packs are installed - CodeProject

http://www.codeproject.com/KB/dotnet/frameworkversiondetection.aspx

 

Determine .NET Framework Version Via Code

http://blogs.windowsclient.net/silverlaw/archive/2009/08/28/determine-net-framework-version-via-code.aspx

 

 

Best regards,

Martin Xie

MSDN Subscriber Support in Forum

If you have any feedback on our support, please contact [e-mail]

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Answer 8

For above C# code sample in some links, you can convert to VB.NET by means of some conversion tools.

1)       Instant VB: C# to VB converter

http://www.tangiblesoftwaresolutions.com/Product_Details/Instant_VB.html

      The tool can convert both entire C# project and C# code snippet to VB.NET.

2)       Code Translation From VB.NET <-> C#

http://www.carlosag.net/Tools/CodeTranslator/

 

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