Running Java, Python, Ruby and Perl programs in .NET
None of those languages are supported natively with .NET.  You can try IronPython or IronRuby for those languages, but to run Java or Perl I think you'll actually need to download and install a Java VM and a perl interpreter.
I've .NET framework 3.5 installed in my laptop. Just .NET alone, no Visual Studio. How can I run Java, Python, Ruby and Perl programs from the console? 
Do I need to install something else also, for running these language files?
In case there is a need for something extra to be installed and after i have all of them, what are the commands that I need to type in the console to run these programs?