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A Safe Way to Get the User to Check if the .NET Framework is Installed

By , 28 Apr 2011
 

My method of choice has always been to look at the Windows folders listed under C:\Windows\Microsoft.NET\Framework.

Each framework version has its own sub-folder:

14/03/2011  23:11    <DIR>          v1.0.3705
14/07/2009  03:37    <DIR>          v1.1.4322
14/03/2011  23:11    <DIR>          v2.0.50727
14/07/2009  05:56    <DIR>          v3.0
14/03/2011  23:11    <DIR>          v3.5
28/04/2011  14:44    <DIR>          v4.0.30319

You also can easily get this from a command prompt by dir %windir%\Microsoft.NET\Framework\ /AD.

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This article, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

About the Author

 DaveAuld
Engineer Apache North Sea Ltd.
United Kingdom United Kingdom
Member
I have been working in the Oil & Gas Industry for over 20 years now.
 
Core Discipline is Instrumentation and Control Systems.
 
Completed Bsc Honours Degree (B29 in Computing) with the Open University in 2012.
 
Currently, Offshore Installation Manager for the Forties Charlie Platform, which is located ~110Miles NE of Aberdeen, Scotland in the North Sea.

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GeneralRe: Thanks!mvpOriginalGriff28 Apr '11 - 22:39 
Thanks!
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GeneralThis is also a good option, but I would rather prefer Charle...memberAll Time Programming9 May '11 - 19:46 
This is also a good option, but I would rather prefer Charles Opperman's Alternative. In that regardless of your system is of 32 or 64 bit, uninstalled but the folder exists, etc nothing matters; You just get the right and appropriate answer. If it is installed it will be listed, if uninstalled it wont be present even is the folders still exists. That will be much safe and accurate response.
Thanks for sharing. I learned something new from your option also.
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GeneralReason for my vote of 5 I learn something new for check inst...mvpRaviRanjankr2 May '11 - 6:03 
Reason for my vote of 5
I learn something new for check installed .net framework.
Thanks for share it Smile | :)
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GeneralUnfortuenatelly this does not show if Full or Client Framewo...memberReinhard Ostermeier29 Apr '11 - 4:47 
Unfortuenatelly this does not show if Full or Client Framework is installed (for .NET 3.5 and 4.0).
Also if .Net was uninstalled the vX.Y folder might still be there.
To be more safe you should check for some dll in this folder.
And on an x64 OS there is also the Framework64 folder.
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GeneralRe: Thats true for almost anything that can be installed/uninsta...mentorDaveAuld29 Apr '11 - 4:55 
Thats true for almost anything that can be installed/uninstalled, but as a quick check its fine. If the folder is not there, then you know its not installed!
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GeneralReason for my vote of 5 With Griffs caveat, a 5 ! :)mvpManfred R. Bihy29 Apr '11 - 3:43 
Reason for my vote of 5
With Griffs caveat, a 5 ! Smile | :)
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GeneralMy only problem with this is that some people should not be ...mvpOriginalGriff28 Apr '11 - 22:31 
My only problem with this is that some people should not be encouraged to know the windows directory exists, much less that they can do anything with it...
 
As an aside: what happens if I press the "Accept Alternate" button? Does your solution replace mine?
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GeneralRe: No it doesn't replace it, it is just listed as an alternate ...mentorDaveAuld28 Apr '11 - 22:32 
No it doesn't replace it, it is just listed as an alternate method.
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About Article
A safe way to get the user to check if the .NET Framework is installed
Type Tip/Trick
Licence CPOL
First Posted 28 Apr 2011
Views 1,680
Bookmarked 1 time
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