title: How do I check the version of the .NET Framework that a DLL file was compiled against?
body: <blockquote>
    <p><strong>Possible Duplicate:</strong><br>
    <a href="https://stackoverflow.com/questions/2310701/determine-framework-clr-version-of-assembly">Determine framework (CLR) version of assembly</a>  </p>
  </blockquote>
  
  
  
  <p>I have a library/DLL file which is compiled in the .NET Framework.</p>
  
  <p>Now (without any coding) I would like to check the .NET Framework version
  which was used to compile this library. I need to know was it 2.0, 3.5, or 4.0.
  Is there any tool that help me to achieve this?
  (I know that it should be compiled under version 4.0 of the Framework, but I need to be 100% sure that version 4.0 of the Framework was used).</p>