Simon Mourier's Blog - i want to know which .net CLR version my application is using

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i want to know which .net CLR version my application is using

Jun 9, 2011 See the question and my original answer on StackOverflow

Maybe the RuntimeEnvironment.GetRuntimeDirectory Method?

EDIT: If you only have access to the registry (if your program is not a .NET one), I suggest you use this SO answer: How to detect what .NET Framework versions and service packs are installed?