Anything to be aware of using .NET 4.0 Assemblies?

[Gregory]

Hi there, I just downloaded a manufacturer's driver which asks me to put a LabVIEW.exe.config file into my <National Instruments>\LabVIEW 2012 folder. I don't want this file for one instrument to have an impact on other projects, is there anything I should be aware of? The contents of the file in a text editor appears to be an XML file:

<?xml version="1.0" encoding="utf-8" ?>
   <configuration>
      <startup useLegacyV2RuntimeActivationPolicy="true">
         <supportedRuntime version="v4.0"></supportedRuntime>
      </startup>
   </configuration>

[Alexander_Sobolev]

Strange, I always thought specification should be  v4.0.30319, not simply v4.0:

http://zone.ni.com/reference/en-XX/help/371361J-01/lvhowto/configuring_clr_version/

If your other components use something specific for old versions, you will have troubles - you can not load 2 different .net versions at the same time. But in general they are backward compatible. https://msdn.microsoft.com/en-us/library/ff602939(v=vs.110).aspx

BTW, there is difference between CLR and .NET version. Now .NET is 4.6, but CLR.dll is loaded from C:\Windows\Microsoft.NET\Framework\v4.0.30319. (Win7) with specification above.