What is equivalent to System.out.println in controller or service file in Nopcommerce?

How to print value on Console
I tried with Console.write() & writeln(variablename) but not getting printed on console at all.
I went to View --> Output -> To see the variable but its not getting shown up.

Debug not working
Also when I am starting debug --> its showing blank page with address localhost:2619 & page getting hanged up.
Help needed.

Thanks.

use Response.write

close all your browser windows. stop the developement server. and u can debug now.

depends where you are expecting to see output.
see http://support.microsoft.com/kb/815788