How to check whether .NET Framework 1.1 is installed

I Installed the .NET framework, then i installed the 1.1 upgrade, suddenly one of the chaps who report to me told that, mine is still 1.0 and not 1.1 (smart chap!!) he went to the IDE, help-about, but it still displayed 1.0.

So, was wondering how to prove him that 1.1 is installed.

The first step is given in the link
the second one which is very basic is
go to c:\winnt\microsoft.net\framework check if you have a folder v1.14322 then
it means that it is installed ;).