http://blogs.msdn.com/b/junfeng/archive/2004/03/11/87782.aspxThis is the first time I know this class exists. It has all the interesting properties about CLR, like runtime version, runtime directory, machine.config file path. Check it out. It is in System.Runtime.InteropServices namespace, weird place. No wonderen-USTelligent Evolution Platform Developer Build (Build: 5.6.50428.7875)http://blogs.msdn.com/b/junfeng/archive/2004/03/11/87782.aspx#228111Sat, 11 Sep 2004 02:22:00 GMT91d46819-8472-40ad-a661-2c78acb4018c:228111Junfeng Zhang's .Net Framework Notes<div style="clear:both;"></div><img src="http://blogs.msdn.com/aggbug.aspx?PostID=228111" width="1" height="1">